Unable to create a PR


I’ve been trying to create a PR recently but I was unable. I’m a bit surprised because I could do it previously but it seems its not working now.

I’ve tried creating a PR in my own repo against my master branch and also against the upstream branch, but neither worked as it did before.

For more information, I’ve tried to create the PR from branches and from the create PR button in the “repo main page”.

Another issue I’ve noticed is that I cannot change branches once I press the Create PR button in the repo main page.

Is there anything I’m missing?

Thanks in advance.