I would recommend you check to see if it’s just that level or any project he does. If every project is broken, I would suggest you reach out to support@code.org and have them look at his account. You would want to give them the account name so they can look into it.
Good luck!
Mike
The same thing happened in my class today. Did you figure out how to restore the page?
I would suggest reaching out to support@code.org for some help. It’s possible that there is a bug.