GitHub Learning Lab course issue

I get this error when I am trying to create a pull request, a task in the first introductory Lab course

https://github.com/EwaKurowska/github-slideshow/pull/create?base=EwaKurowska%3Amain&head=EwaKurowska%3Amy-slide might be temporarily down or it may have moved permanently to a new web address.
ERR_HTTP2_PROTOCOL_ERROR

Can you please help?

Thanks in advance!

Ewa

Just go to your repository and click on the Pull Requests tab and then on “new”.