W4_Unknown error denying notebook submission

Whenever I try to save my jupyter file, it shows me that. I can’t even submit my assignment!

Hello @Vikas_Kalsariya!

Several students facing this issue. We already informed the course staff to look into the issue as soon as possible. We are extremely sorry for the inconvenience caused to you because of this error. We understand how frustrating this is but we have no other option but to wait. Sadly, we don’t know the exact time when the problem will be resolved but hope they will resolve it soon.

Your patience will be highly appreciated. Once they resolve the issue, we will inform you.


Hi @Vikas_Kalsariya! Sorry for the delay.

Kindly try this:

  1. From the blank notebook, click File -> Open.
  2. Tick the running notebook.
  3. Click Shutdown then Duplicate.
  4. Rename the old notebook (any filename).
  5. Rename the duplicate with the original filename (basically, just remove the -Copy1 string).
  6. Open this newly renamed notebook.
  7. You should be able to save this and also see the submit button after a minute.

You “might see an error about checkpoints failing. I think that’s okay because that’s related to the permissions of the hidden .ipynb_checkpoints folder. That is not needed for grading as far as I know. The changes should persist in the actual notebook itself even if they see that error. I submitted the notebook and got the expected grade.”


Hi @saifkhanengr,
I’m having the same problems, and when I try to follow your instructions here, I’m unable to duplicate the file, with the same “permission denied” message.
Getting the latest copy of the notebook doesn’t help either, and I’m unable to delete the old version due to permission being denied.

Thank you @Esther_John for the feedback. We are working with Cousera about it now.


Hi @Vikas_Kalsariya @Esther_John,

Try this temporary hack. It worked for many learners with a few exceptions.