core.js:4002 ERROR Error: Uncaught (in promise): Error: Unexpected value 'undefined' imported by the module 'ArticleModule' Error: Unexpected value 'undefined' imported by the module 'ArticleModule' code example

Example 1: compiler.js:2175 Uncaught Error: Unexpected value 'undefined' imported by the module 'AppRoutingModule' at syntaxError

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

Example 2: compiler.js:2175 Uncaught Error: Unexpected value 'undefined' imported by the module 'AppRoutingModule' at syntaxError

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