Why I can't run example file but I can run other project that using modalbox

Is anyone same here ? Error log below.

error: bundling failed: Error: Unable to resolve mod
ule react-native-button from /Users/artaro/Test1/App.js: Module react-native-button does not exist in the Haste module map

This might be related to https://github.com/facebook/react-native/issues/4968
To resolve try the following:

1. Clear watchman watches: watchman watch-del-all.
2. Delete the node_modules folder: rm -rf node_modules && npm install.
3. Reset Metro Bundler cache: rm -rf /tmp/metro-bundler-cache-* or npm start -- --reset-cache.
4. Remove haste cache: rm -rf /tmp/haste-map-react-native-packager-*.
   at ModuleResolver.resolveDependency (/Users/artaro/Test1/node_modules/metro/src/node-haste/DependencyGraph/ModuleResolution.js:139:15)
   at ResolutionRequest.resolveDependency (/Users/artaro/Test1/node_modules/metro/src/node-haste/DependencyGraph/ResolutionRequest.js:49:18)
   at DependencyGraph.resolveDependency (/Users/artaro/Test1/node_modules/metro/src/node-haste/DependencyGraph.js:219:16)
   at Object.resolve (/Users/artaro/Test1/node_modules/metro/src/lib/transformHelpers.js:141:30)
   at dependencies.map.result (/Users/artaro/Test1/node_modules/metro/src/DeltaBundler/traverseDependencies.js:373:31)
   at Array.map ()
   at resolveDependencies (/Users/artaro/Test1/node_modules/metro/src/DeltaBundler/traverseDependencies.js:369:18)
   at /Users/artaro/Test1/node_modules/metro/src/DeltaBundler/traverseDependencies.js:188:33
   at Generator.next ()
   at step (/Users/artaro/Test1/node_modules/metro/src/DeltaBundler/traverseDependencies.js:298:30)
   DELTA [android, dev] ./index.js ░░░░░░░░░░░░░░░░ 0.0% (0/1), failed.

Start with the example's App.js and the unresolved react-native-button import shown in the error log. Reproduce the example bundling failure and inspect how its dependencies are declared. Done means the example resolves react-native-button and bundles successfully without the reported module-resolution error.