error while running Age-Viewer using : npm run start

I did
> npm run setup
and then
> npm run start
but I got the following errors:
internal/modules/cjs/loader.js:883
throw err;
^

Error: Cannot find module '@babel/runtime/helpers/interopRequireDefault'
Require stack:
- /home/linu/age-viewer/backend/src/controllers/cypherController.js
- /home/linu/age-viewer/backend/src/routes/cypherRouter.js
- /home/linu/age-viewer/backend/src/app.js
- /home/linu/age-viewer/backend/src/bin/www.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:880:15)
at Function.Module._load (internal/modules/cjs/loader.js:725:27)
at Module.require (internal/modules/cjs/loader.js:952:19)
at require (internal/modules/cjs/helpers.js:88:18)
at Object. (/home/linu/age-viewer/backend/src/controllers/cypherController.js:3:30)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
at Module._compile (/home/linu/age-viewer/backend/node_modules/pirates/lib/index.js:129:24)
at Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Object.newLoader [as .js] (/home/linu/age-viewer/backend/node_modules/pirates/lib/index.js:134:7)
at Module.load (internal/modules/cjs/loader.js:928:32) {
code: 'MODULE_NOT_FOUND',
requireStack: [
'/home/linu/age-viewer/backend/src/controllers/cypherController.js',
'/home/linu/age-viewer/backend/src/routes/cypherRouter.js',
'/home/linu/age-viewer/backend/src/app.js',
'/home/linu/age-viewer/backend/src/bin/www.js'
]
}
How can I solve this problem?