Hey, Nice article ! I like it, BTW when I run the compiled app, I have an issue :( . The following _CastError was thrown building _BodyBuilder: type 'Null' is not a subtype of type 'JokeBloc' in type cast The relevant error-causing widget was Scaffold package:test_bloc/…/home/home.dart:15 When the exception was thrown, this was the stack Any idea what it can be ? Because I'm really interested to use this pattern for our future apps