Programming assignment problem

Hello everyone !!!
brothers, can you help me ?
I have implemented all the tasks in the assignment lab, and I have written my code in the specific place, namely between start code and end code.
and my code outputs are the same with the expected.
but my assignment is graded with 0 score.

Your error is telling in the feature selection where None is not replaced with an assigned output. Check again feature selection once more.

Please click my name and message your notebook as an attachment.