C2W1_Assignment auto-grader error

I have completed this assignment to what I believe is an acceptable level. All cells run successfully with some output, so there should be some grade produced. However I continue to get 0/90 saying that there is a syntax error preventing the notebook from compiling. I have refreshed / rebooted the notebook a few times & copy/pasted to resolve but to no avail. I now receive the following msg:

We encountered the following warnings when grading this part:

  • Grader error: Malformed feedback. Please visit the Discussion forum to see if your peers are experiencing similar errors. If the error isn’t resolved in 24 hours, please reach out to Coursera through our Help Center.


Hi Dan! Welcome to Discourse! Please check your inbox. It looks like you’ve already tried the usual fixes so we may need to look more closely. Thanks!

Hi Dan,

I have the same error on my side, did you manage to solve it by any chance?

Hi @chris.favila , I have also the same issues and send in a separate form as well, but didn’t get a reply and solution yet.

I have performed all the steps you have highlighted and copied all the existing solutions to the C2W1_Assignment.ipynb.` However, still, the grader output showed an error.

There was a problem compiling the code from your notebook. Details:
‘NoneType’ object is not iterable

Hi! Kindly check your inbox. Thank you!

I have the same issue, is there a publicly known solution