UML example on MAIN branch cannot be build and run

Hello,

cloned the repository on April, 22nd.

using
git 2.25.1
node.js 12.22.1
Openjdk 11.0.14
Maven 3.6.3
yarn 1.22.11
on
Ubuntu 20.04 in WSL2

the server can be build, but the client does not build correctly (see missing modules in bold). The client can be started and accessed from the browser, but throws a lot of errors on startup.
Please see the following protocols of the client build and startup.

Best Regards,

J. Mutschall

yarn install v1.22.11
[1/5] Validating package.json...
[2/5] Resolving packages...
warning Resolution field "snabbdom@3.0.3" is incompatible with requested version "snabbdom@^0.7.0"
warning Resolution field "@vscode/codicons@0.0.28" is incompatible with requested version "@vscode/codicons@^0.0.25"
success Already up-to-date.
$ lerna run prepare
lerna info version 2.11.0
@eclipsesource/uml-glsp-common: yarn run v1.22.11
@eclipsesource/uml-glsp-common: $ yarn run clean && yarn run build
@eclipsesource/uml-glsp-common: $ rimraf lib
@eclipsesource/uml-glsp-common: $ tsc && yarn run lint
@eclipsesource/uml-glsp-common: $ eslint -c ./.eslintrc.js --ext .ts ./src
@eclipsesource/uml-glsp-common: Done in 5.00s.
@eclipsesource/uml-sprotty: yarn run v1.22.11
@eclipsesource/uml-sprotty: $ yarn run clean && yarn run build
@eclipsesource/uml-sprotty: $ rimraf lib
@eclipsesource/uml-sprotty: $ tsc && yarn run lint
@eclipsesource/uml-sprotty: $ eslint -c ./.eslintrc.js --ext .ts,.tsx ./src
@eclipsesource/uml-sprotty: Done in 5.46s.
@eclipsesource/uml-theia: yarn run v1.22.11
@eclipsesource/uml-theia: $ yarn run clean && yarn run build
@eclipsesource/uml-theia: $ rimraf lib
@eclipsesource/uml-theia: $ tsc && yarn run lint
@eclipsesource/uml-theia: $ eslint -c ./.eslintrc.js --ext .ts ./src
@eclipsesource/uml-theia: Done in 6.40s.
browser-app: yarn run v1.22.11
browser-app: $ theia build --mode development && yarn download:plugins
**browser-app: Failed to resolve module: socket.io
browser-app: Failed to resolve module: ws
browser-app: Failed to resolve module: filenamify**
browser-app: assets by status 1.89 MiB [cached] 23 assets
browser-app: assets by path *.js 19.1 MiB
browser-app: assets by chunk 11.2 MiB (id hint: vendors)
browser-app: asset vendors-node_modules_eclipse-glsp_theia-integration_lib_browser_diagram_glsp-diagram-manager_-a838e9.bundle.js 1.41 MiB [compared for emit] (id hint: vendors) 2 related assets
browser-app: asset vendors-node_modules_theia_plugin-ext_lib_hosted_browser_worker_worker-main_js.bundle.js 1.41 MiB [compared for emit] (id hint: vendors) 2 related assets
browser-app: asset vendors-node_modules_sprotty-theia_lib_theia_diagram-module_js.bundle.js 1.05 MiB [compared for emit] (id hint: vendors) 2 related assets
browser-app: + 75 assets
browser-app: + 20 assets
browser-app: assets by path vs/ 21.5 MiB
browser-app: assets by path vs/editor/ 19.9 MiB 13 assets
browser-app: assets by path vs/base/ 1.48 MiB
browser-app: asset vs/base/worker/workerMain.js.map 820 KiB [compared for emit] [from: ../node_modules/@theia/monaco-editor-core/dev/vs/base/worker/workerMain.js.map] [copied] 1 related asset
browser-app: + 2 assets
browser-app: asset vs/loader.js 86.5 KiB [compared for emit] [from: ../node_modules/@theia/monaco-editor-core/dev/vs/loader.js] [copied] 1 related asset
browser-app: runtime modules 12 KiB 22 modules
browser-app: orphan modules 14.1 KiB [orphan] 8 modules
browser-app: javascript modules 15.1 MiB
browser-app: modules by path ../node_modules/ 15 MiB 2149 modules
browser-app: modules by path ../packages/ 83.8 KiB 43 modules
browser-app: + 8 modules
browser-app: asset modules 119 KiB (javascript) 1.89 MiB (asset) 109 modules
browser-app: json modules 1.02 MiB
browser-app: modules by path ../node_modules/@theia/core/src/ 807 KiB 48 modules
browser-app: modules by path ../node_modules/@theia/core/node_modules/ 89.8 KiB 10 modules
browser-app: modules by path ../node_modules/@theia/monaco/ 115 KiB 9 modules
browser-app: ../node_modules/@theia/plugin-ext/package.json 2.06 KiB [built] [code generated]
browser-app: ../node_modules/entities/lib/maps/entities.json 28.4 KiB [built] [code generated]
browser-app:
browser-app: WARNING in ../node_modules/@theia/plugin-ext/src/main/browser/style/index.css (../node_modules/css-loader/dist/cjs.js!../node_modules/@theia/plugin-ext/src/main/browser/style/index.css)
browser-app: Module Warning (from ../node_modules/css-loader/dist/cjs.js):
browser-app: Warning
browser-app: (38:5) Unable to find uri in '-webkit-mask: url('')'
browser-app: @ ../node_modules/@theia/plugin-ext/src/main/browser/style/index.css 2:12-89 9:17-24 13:15-29
browser-app: @ ../node_modules/@theia/plugin-ext/lib/main/browser/plugin-ext-frontend-module.js 19:0-52
browser-app: @ ../node_modules/@theia/plugin-ext/lib/plugin-ext-frontend-module.js 18:37-89
browser-app: @ ./src-gen/frontend/index.js 71:31-89
browser-app: WARNING in ../node_modules/@theia/plugin-ext/src/main/browser/style/index.css (../node_modules/css-loader/dist/cjs.js!../node_modules/@theia/plugin-ext/src/main/browser/style/index.css)
browser-app: Module Warning (from ../node_modules/css-loader/dist/cjs.js):
browser-app: Warning
browser-app: (39:5) Unable to find uri in 'mask: url('')'
browser-app: @ ../node_modules/@theia/plugin-ext/src/main/browser/style/index.css 2:12-89 9:17-24 13:15-29
browser-app: @ ../node_modules/@theia/plugin-ext/lib/main/browser/plugin-ext-frontend-module.js 19:0-52
browser-app: @ ../node_modules/@theia/plugin-ext/lib/plugin-ext-frontend-module.js 18:37-89
browser-app: @ ./src-gen/frontend/index.js 71:31-89
browser-app: WARNING in ../node_modules/inversify/lib/annotation/decorator_utils.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/decorator_utils.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/decorator_utils.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 38:24-63
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/inject.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/inject.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/inject.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 21:15-45
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/injectable.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/injectable.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/injectable.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 15:19-53
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/multi_inject.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/multi_inject.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/multi_inject.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 28:21-57
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/named.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/named.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/named.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 19:14-43
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/optional.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/optional.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/optional.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 24:17-49
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/post_construct.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/post_construct.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/post_construct.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 32:23-61
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/tagged.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/tagged.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/tagged.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 17:15-45
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/target_name.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/target_name.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/target_name.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 30:20-55
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/annotation/unmanaged.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/unmanaged.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/annotation/unmanaged.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 26:18-51
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/bindings/binding.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/bindings/binding.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/bindings/binding.ts'
browser-app: @ ../node_modules/inversify/lib/container/container.js 45:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/bindings/binding_count.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/bindings/binding_count.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/bindings/binding_count.ts'
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 4:22-58
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/constants/error_msgs.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/constants/error_msgs.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/constants/error_msgs.ts'
browser-app: @ ../node_modules/inversify/lib/annotation/injectable.js 4:18-52
browser-app: @ ../node_modules/inversify/lib/inversify.js 15:19-53
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/constants/literal_types.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/constants/literal_types.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/constants/literal_types.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 8:22-58
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/constants/metadata_keys.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/constants/metadata_keys.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/constants/metadata_keys.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 4:11-47
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/container/container.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/container.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/container.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/container/container_module.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/container_module.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/container_module.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 12:25-64
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/container/container_snapshot.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/container_snapshot.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/container_snapshot.ts'
browser-app: @ ../node_modules/inversify/lib/container/container.js 55:27-58
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/container/lookup.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/lookup.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/container/lookup.ts'
browser-app: @ ../node_modules/inversify/lib/container/container.js 56:15-34
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/inversify.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/inversify.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/inversify.ts'
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/context.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/context.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/context.ts'
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 10:16-36
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/metadata.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/metadata.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/metadata.ts'
browser-app: @ ../node_modules/inversify/lib/annotation/tagged.js 4:17-48
browser-app: @ ../node_modules/inversify/lib/inversify.js 17:15-45
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/metadata_reader.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/metadata_reader.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/metadata_reader.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 34:24-61
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/plan.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/plan.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/plan.ts'
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 12:13-30
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/planner.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/planner.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/planner.ts'
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/queryable_string.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/queryable_string.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/queryable_string.ts'
browser-app: @ ../node_modules/inversify/lib/planning/target.js 7:25-54
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 15:15-34
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/reflection_utils.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/reflection_utils.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/reflection_utils.ts'
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 13:25-54
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/request.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/request.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/request.ts'
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 14:16-36
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/planning/target.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/target.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/planning/target.ts'
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 15:15-34
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/resolution/instantiation.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/resolution/instantiation.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/resolution/instantiation.ts'
browser-app: @ ../node_modules/inversify/lib/resolution/resolver.js 8:22-48
browser-app: @ ../node_modules/inversify/lib/container/container.js 51:17-50
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/resolution/resolver.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/resolution/resolver.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/resolution/resolver.ts'
browser-app: @ ../node_modules/inversify/lib/container/container.js 51:17-50
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/syntax/binding_in_syntax.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_in_syntax.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_in_syntax.ts'
browser-app: @ ../node_modules/inversify/lib/syntax/binding_in_when_on_syntax.js 4:26-56
browser-app: @ ../node_modules/inversify/lib/syntax/binding_to_syntax.js 6:34-72
browser-app: @ ../node_modules/inversify/lib/container/container.js 52:26-64
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/syntax/binding_in_when_on_syntax.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_in_when_on_syntax.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_in_when_on_syntax.ts'
browser-app: @ ../node_modules/inversify/lib/syntax/binding_to_syntax.js 6:34-72
browser-app: @ ../node_modules/inversify/lib/container/container.js 52:26-64
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/syntax/binding_on_syntax.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_on_syntax.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_on_syntax.ts'
browser-app: @ ../node_modules/inversify/lib/syntax/binding_in_when_on_syntax.js 5:26-56
browser-app: @ ../node_modules/inversify/lib/syntax/binding_to_syntax.js 6:34-72
browser-app: @ ../node_modules/inversify/lib/container/container.js 52:26-64
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/syntax/binding_to_syntax.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_to_syntax.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_to_syntax.ts'
browser-app: @ ../node_modules/inversify/lib/container/container.js 52:26-64
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/syntax/binding_when_on_syntax.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_when_on_syntax.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_when_on_syntax.ts'
browser-app: @ ../node_modules/inversify/lib/syntax/binding_to_syntax.js 7:31-66
browser-app: @ ../node_modules/inversify/lib/container/container.js 52:26-64
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/syntax/binding_when_syntax.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_when_syntax.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/binding_when_syntax.ts'
browser-app: @ ../node_modules/inversify/lib/syntax/binding_in_when_on_syntax.js 6:28-60
browser-app: @ ../node_modules/inversify/lib/syntax/binding_to_syntax.js 6:34-72
browser-app: @ ../node_modules/inversify/lib/container/container.js 52:26-64
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/syntax/constraint_helpers.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/constraint_helpers.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/syntax/constraint_helpers.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 40:27-65
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/utils/binding_utils.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/binding_utils.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/binding_utils.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 47:22-54
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/utils/exceptions.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/exceptions.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/exceptions.ts'
browser-app: @ ../node_modules/inversify/lib/planning/planner.js 8:19-49
browser-app: @ ../node_modules/inversify/lib/container/container.js 50:16-46
browser-app: @ ../node_modules/inversify/lib/inversify.js 6:18-50
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/utils/id.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/id.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/id.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 36:11-32
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/inversify/lib/utils/serialization.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/serialization.ts' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/inversify/src/utils/serialization.ts'
browser-app: @ ../node_modules/inversify/lib/inversify.js 45:22-54
browser-app: @ ./src-gen/frontend/index.js 5:22-42
browser-app: WARNING in ../node_modules/vscode-textmate/release/main.js 23:15-27
browser-app: Critical dependency: the request of a dependency is an expression
browser-app: @ ../node_modules/@theia/monaco/lib/browser/textmate/monaco-theme-registry.js 27:26-52
browser-app: @ ../node_modules/@theia/monaco/lib/browser/monaco-theming-service.js 36:32-75
browser-app: @ ../node_modules/@theia/monaco/lib/browser/monaco-frontend-module.js 55:33-68
browser-app: @ ../node_modules/@theia/monaco/lib/browser/monaco-browser-module.js 25:45-80
browser-app: @ ./src-gen/frontend/index.js 52:31-88
browser-app: WARNING in ../node_modules/vscode-textmate/release/main.js
browser-app: Module Warning (from ../node_modules/source-map-loader/dist/cjs.js):
browser-app: Failed to parse source map from '/home/juergen/glsp/uml-glsp/client/node_modules/vscode-textmate/release/main.js.map' file: Error: ENOENT: no such file or directory, open '/home/juergen/glsp/uml-glsp/client/node_modules/vscode-textmate/release/main.js.map'
browser-app: @ ../node_modules/@theia/monaco/lib/browser/textmate/monaco-theme-registry.js 27:26-52
browser-app: @ ../node_modules/@theia/monaco/lib/browser/monaco-theming-service.js 36:32-75
browser-app: @ ../node_modules/@theia/monaco/lib/browser/monaco-frontend-module.js 55:33-68
browser-app: @ ../node_modules/@theia/monaco/lib/browser/monaco-browser-module.js 25:45-80
browser-app: @ ./src-gen/frontend/index.js 52:31-88
browser-app: 44 warnings have detailed information that is not shown.
browser-app: Use 'stats.errorDetails: true' resp. '--stats-error-details' to show it.
browser-app: webpack 5.69.1 compiled with 46 warnings in 10855 ms
browser-app: $ theia download:plugins
browser-app: --- downloading plugins ---
browser-app: - vscode-builtin-json: already downloaded - skipping
browser-app: - vscode-builtin-json-language-features: already downloaded - skipping
browser-app: --- collecting extension-packs ---
browser-app: --- collecting extension dependencies ---
browser-app: Done in 12.57s.
lerna success run Ran npm script 'prepare' in packages:
lerna success - browser-app
lerna success - @eclipsesource/uml-glsp-common
lerna success - @eclipsesource/uml-sprotty
lerna success - @eclipsesource/uml-theia
Done in 30.44s.

---------------------------------------------------------------------------------------------------------------

yarn start
yarn run v1.22.11
$ cd browser-app && yarn start
$ theia start --UML_GLSP=5007 --hostname=0.0.0.0 --root-dir=../workspace --plugins=local-dir:./plugins
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
root INFO Configuration directory URI: 'file:///home/juergen/.theia'
root INFO Backend Object.initialize: 3.3 ms [Finished 0.471 s after backend start]
root INFO Backend Object.configure: 2.6 ms [Finished 0.471 s after backend start]
root INFO Backend MessagingContribution.onStart: 1.3 ms [Finished 0.471 s after backend start]
root INFO Backend LocalizationBackendContribution.configure: 0.3 ms [Finished 0.471 s after backend start]
root ERROR Could not initialize contribution Error: Cannot find module '../../../i18n/nls.cs.json'
Require stack:
- /home/juergen/glsp/uml-glsp/client/node_modules/@theia/core/lib/node/i18n/theia-localization-contribution.js
- /home/juergen/glsp/uml-glsp/client/node_modules/@theia/core/lib/node/i18n/i18n-backend-module.js
- /home/juergen/glsp/uml-glsp/client/browser-app/src-gen/backend/server.js
- /home/juergen/glsp/uml-glsp/client/browser-app/src-gen/backend/main.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
at Function.Module._load (internal/modules/cjs/loader.js:667:27)
at Module.require (internal/modules/cjs/loader.js:887:19)
at require (internal/modules/cjs/helpers.js:74:18)
at TheiaLocalizationContribution.registerLocalizations (/home/juergen/glsp/uml-glsp/client/node_modules/@theia/core/lib/node/i18n/theia-localization-contribution.js:28:56)
at /home/juergen/glsp/uml-glsp/client/node_modules/@theia/core/lib/node/i18n/localization-contribution.js:35:98
at Array.map ()
at LocalizationRegistry.initialize (/home/juergen/glsp/uml-glsp/client/node_modules/@theia/core/lib/node/i18n/localization-contribution.js:35:65)
at LocalizationBackendContribution.initialize (/home/juergen/glsp/uml-glsp/client/node_modules/@theia/core/lib/node/i18n/localization-backend-contribution.js:33:41)
at /home/juergen/glsp/uml-glsp/client/node_modules/@theia/core/lib/node/backend-application.js:118:106
root INFO Backend NodeFileUploadService.configure: 0.7 ms [Finished 0.472 s after backend start]
root INFO Backend DefaultModelServerLauncher.initialize: 4.1 ms [Finished 0.476 s after backend start]
root INFO Backend FileDownloadEndpoint.configure: 0.5 ms [Finished 0.477 s after backend start]
root INFO Backend PluginDeployerContribution.initialize: 0.2 ms [Finished 0.477 s after backend start]
root INFO Backend PluginApiContribution.configure: 0.7 ms [Finished 0.478 s after backend start]
root INFO Backend WebviewBackendSecurityWarnings.initialize: 0.3 ms [Finished 0.478 s after backend start]
root INFO Backend HostedPluginReader.configure: 0.1 ms [Finished 0.478 s after backend start]
root INFO Backend HostedPluginReader.configure: 0.5 ms [Finished 0.479 s after backend start]
root INFO Backend MetricsBackendApplicationContribution.configure: 0.1 ms [Finished 0.479 s after backend start]
root INFO Theia app listening on http://0.0.0.0:3000.
root WARN The local plugin referenced by local-dir:/home/juergen/.theia/plugins does not exist.
root WARN The local plugin referenced by local-dir:/home/juergen/.theia/extensions does not exist.
root INFO ModelServerBackendContribution: Starting modelserver from jar
root INFO PluginTheiaDirectoryHandler: accepting plugin with path /home/juergen/glsp/uml-glsp/client/browser-app/plugins/vscode-builtin-json
root INFO Resolved "vscode-builtin-json" to a VS Code extension "json@1.46.1" with engines: { vscode: '0.10.x' }
root INFO PluginTheiaDirectoryHandler: accepting plugin with path /home/juergen/glsp/uml-glsp/client/browser-app/plugins/vscode-builtin-json-language-features
root INFO Resolved "vscode-builtin-json-language-features" to a VS Code extension "json-language-features@1.46.1" with engines: { vscode: '0.10.x' }
root INFO Backend DefaultWorkspaceServer.onStart: 18.4 ms [Finished 0.490 s after backend start]
root INFO Backend TaskBackendApplicationContribution.onStart: 0.3 ms [Finished 0.490 s after backend start]
root WARN Failed to resolve module: socket.io
root WARN Failed to resolve module: ws
root WARN Failed to resolve module: filenamify
root INFO Backend MetricsBackendApplicationContribution.onStart: 25.9 ms [Finished 0.516 s after backend start]
root INFO Finished starting backend application: 0.0 ms [Finished 0.516 s after backend start]
root INFO Resolve plugins list: 39.8 ms [Finished 0.518 s after backend start]
root INFO Deployed backend plugin "json@1.46.1" from "/home/juergen/glsp/uml-glsp/client/browser-app/plugins/vscode-builtin-json/extension": 2.4 ms [Finished 0.521 s after backend start]
root INFO Deployed backend plugin "json-language-features@1.46.1" from "/home/juergen/glsp/uml-glsp/client/browser-app/plugins/vscode-builtin-json-language-features/extension/client/dist/jsonMain": 0.7 ms [Finished 0.522 s after backend start]
root INFO Deploy plugins list: 39.8 ms [Finished 0.522 s after backend start]
root ERROR UmlGLSPServerContribution: log4j:WARN No appenders could be found for logger (org.eclipse.glsp.server.launch.SocketGLSPServerLauncher).

root ERROR UmlGLSPServerContribution: log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

root INFO UmlGLSPServerContribution: [GLSP-Server]:Startup completed

root INFO ModelServerBackendContribution: 2022-04-22 12:23:38,584 main WARN No Log4j 2 configuration file found. Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. See https://logging.apache.org/log4j/2.x/manual/configuration.html for instructions on how to configure Log4j 2

root INFO ModelServerBackendContribution: 2022-04-22 12:23:38,593 main WARN No Log4j 2 configuration file found. Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. See https://logging.apache.org/log4j/2.x/manual/configuration.html for instructions on how to configure Log4j 2

root ERROR ModelServerBackendContribution: SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation

root ERROR ModelServerBackendContribution: SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

root ERROR ModelServerBackendContribution: 2022-04-22 12:23:39.210:INFO::main: Logging initialized @2020ms to org.eclipse.jetty.util.log.StdErrLog

root ERROR ModelServerBackendContribution: -------------------------------------------------------------------

-------------------------------------------------------------------
Missing dependency 'Slf4j simple'. Add the dependency.

pom.xml:

org.slf4j
slf4j-simple
1.7.31

build.gradle:
implementation group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.31'

Find the latest version here:
https://search.maven.org/search?q=g%3Aorg.slf4j+AND+a%3Aslf4j-simple
-------------------------------------------------------------------
-------------------------------------------------------------------
OR
-------------------------------------------------------------------

-------------------------------------------------------------------
Missing dependency 'Slf4j simple with Provider'. Add the dependency.

pom.xml:

org.slf4j
slf4j-api
1.8.0-beta4

build.gradle:
implementation group: 'org.slf4j', name: 'slf4j-api', version: '1.8.0-beta4'

Find the latest version here:
https://search.maven.org/search?q=g%3Aorg.slf4j+AND+a%3Aslf4j-api
------------------------------------------------------------------- and

-------------------------------------------------------------------
Missing dependency 'Slf4j simple with Provider'. Add the dependency.

pom.xml:

org.slf4j
slf4j-simple
1.8.0-beta4

build.gradle:
implementation group: 'org.slf4j', name: 'slf4j-simple', version: '1.8.0-beta4'

Find the latest version here:
https://search.maven.org/search?q=g%3Aorg.slf4j+AND+a%3Aslf4j-simple
-------------------------------------------------------------------
-------------------------------------------------------------------
Visit https://javalin.io/documentation#logging if you need more help

Start by reproducing the client setup from the issue with yarn install and the browser-app build on the listed Ubuntu, Node.js, Java, Maven, and Yarn versions. Investigate why socket.io, ws, and filenamify are unresolved and compare the startup errors; done means the client builds and starts without the reported missing-module and startup errors.

Written by the indexing model from the issue text.