latelnitializationError: field ‘keyword’ has not been initialized. See also: https://docs.flutter.dev/testing/errors

The code in question means that the keyword part has not been initialized. in the keyword section 

Just add it as shown below.

flutter Dart

Well, I hope you enjoy the program.

thank you


@override
Future<void> onLoad() async {
super.onLoad();
keyword = KeyWord();
}