Angular2 material dialog has issues - Did you add it to @NgModule.entryComponents?

Question

I am trying to follow the docs on https://material.angular.io/components/component/dialog but I cannot understand why it has the below issue?

I added the below on my

Answer 1

You need to add dynamically created components to entryComponents inside your @NgModule

@NgModule({
  declarations: [
    AppComponent,
    LoginComponent,
    DashboardComponent,
    HomeComponent,
    DialogResultExampleDialog        
  ],
  entryComponents: [DialogResultExampleDialog]

Note: In some cases entryComponents under lazy loaded modules will not work, as a workaround put them in your app.module (root)