Why C3_W1_Assignment grader eror?

why doesn’t the assessment appear and there is writing There was a problem compiling the code from your notebook. Details:
cannot assign to None (, line 534)

Hi, can you please show the snapshot where this appears:

cannot assign to None (, line 534)

You do not need to view the notebook metadata. Nothing in there should be modified. That’s not where the grader output appears.

Do not edit the metadata.

I agree with @Nydia, it appears that somewhere in your notebook, there is still a “None” statement.

Did you manage to fix it? I have the same issue

Did u mange to fix it? I have the same issue…

I am stuck here, Can some one please help me resolving this
I am getting 0 for this only

Please go to the “File → Open” menu, and post back a screen capture image that shows the entire contents of your folder.