Angular 6 - can't resolve all parameters for AppComponent

Question

I am trying to build an application with Angular 6 and I am still setting everything up. But it seems there is something wrong with the dependency injection in my app.

Answer 1

I received the same error on Angular 8 app

Can't resolve all parameters for AppComponent: (?,?,?)

after changing 1 parameter type in the constructor().

I solved the problem by stop and restarting the app.