Validation and nb-grader problems

I’ve been having the same problem for 5 days with the programming assignement of week 3. The validation step won’t work and after submitting I keep having 0 as a result while my code is correct. I reported the issue but the problem hasn’t been solved yet.

I’ve seen this error reported occasionally over the years. It always turns out to be that some part of the notebook has been damaged outside of the code areas. Your best bet is to use the topic on the FAQ Thread to get a clean copy of this notebook. Save yours first, of course, under a different name. Then very carefully “copy/paste” over just your completed code into the fresh copy and see if that helps. Let us know if that doesn’t work!

It didn’t work unfortunately and the deadline is almost here.

The deadlines here are meaningless, in the sense that there is no penalty for missing them. They just reset automatically. So you don’t need to stress out about that.

I will send you a private message by DM to suggest some further steps.

Thank you very much !