!) Your Notifier block ....call ExitDialog.ShowChooseDialog is NOT an App Inventor 2 Block (animationType) is not part the component. Is this from Thunkable? Mixing blocks from other App Inventor compilers with App Inventor 2 is not possible. If you build a project with an App Inventor 2 clone, do not expect it to run in App Inventor 2.
2) It is not possible for a developer to have his/her own question thread. If you have a new question, please start a new topic. Thanks.
Regards,
Steve