Challenge 3

Why am I seeing "File Save Error for challenge-x.ipynb, Invalid Response: 403 Forbidden"?

If you see this error for challenge-3.ipynb you have two options to fix this issue:
Option 1: Go to Challenge 3b problem statement (green block) and replace normal quotation ('') with back quotations (``) for seed_simulator=1024 and `seed_transpiler=1024`.
Option 2: Rename your current notebook to `challenge-3-anythingyoulike` and then go to the challenge dashboard and reload the page. You should see a new `challenge-3.ipynb` created under the challenge-3 folder. Copy-paste any code you wrote in the old notebook to the new one to start from where you left off. Then you can delete the old notebook to stop the error messages to reappear.

The grader keep rejecting my code in Challenge-3c, what should I do?

Restarting the kernel should fix this issue.