App failed to compile upon save

[peterson-umoke]

I'm submitting a...

• [* ] Bug report
• Feature request
• Documentation issue or request

Current behavior

once i save any file after running yarn start, it shows this
Failed to compile.

./src/app/app.module.ngfactory.js
Module not found: Error: Can't resolve '@angular/router.ngfactory' in 'C:\xampp\htdocs\WebAPPSEngine\src\app'

Expected behavior

i expect the app to reload and show the new updated change

Minimal reproduction of the problem with instructions

lauch a new app, running the latest cli and yarn, create the new app and install any new npm package say, angularfire2, firebase and classlist.js, change any file, and the issue will just begin

Environment

- generator version: X.Y.Z
- node version: X.Y.Z  <!-- run `node --version` -->
- npm version: X.Y.Z  <!-- run `npm --version` -->
- OS:  <!-- Mac, Linux, Windows -->

Others:

[sinedied]

Duplicate of #352 and #366, please see the fix in #366.