Error: Unexpected value 'undefined' imported by the module

For anyone facing this same error, my situation was that I have double commas in the imports section

imports: [
      BrowserModule,
      HttpModule,
      FormsModule,
      RouterModule.forRoot(appRoutes), , // <-- this was the error
      // .... 
],

This can be caused by multiple scenarios like

1. Missing commas

imports: [
    BrowserModule
   ,routing <= Missing Comma
   ,FeatureComponentsModule
  ],

2. Double Commas

imports: [
    BrowserModule, 
   ,routing <=Double Comma
   ,FeatureComponentsModule
  ],

3. Exporting Nothing from the Module
4. Syntax errors
5. Typo Errors
6. Semicolons inside Objects, Arrays
7. Incorrect import Statements

Make sure the modules don't import each other. So, there shouldn't be

In Module A: imports[ModuleB]

In Module B: imports[ModuleA]