Course 1 week 2 assignment error: 'Sequential' object has no attribute 'stop'

Although I complete the desired space of code properly, I got the below. any solution appreciated.
There was a problem compiling the code from your notebook : Details: ‘Sequential’ object has no attribute 'stop’

[code removed - moderator]

It should be self.model.stop_training and not

Thank you. I appreciate your time. great help.