BAssured

flutter_clean_architecture-5.0.4/lib/src/view.dart:142:29: Error: Method 'addObserver' cannot be called on 'WidgetsBinding?' because it is potentially null. 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../Desktop/projects/flutter/packages/flutter/lib/src/widgets/binding.dart'). Try calling using ?. instead. WidgetsBinding.instance.addObserver(_controller); ^^^^^^^^^^^ Failed to package com.example.app....