Grader Error: Grader feedback not found in C3W1

Dear @Samira_Ghodratnama ,

Sorry to hear that.

Kindly follow the method mentioned in this link Clean_copy. (Thanks @paulinpaloalto)

I followed exact steps mentioned in the post and after several try it worked out.


  1. Rename your current notebook.
  2. Open clean version of notebook as mentioned in the link.
  3. Carefully copy everything to the new notebook.

I hope it helps.

All the best.