500 on accessing new issue /choose page

When visiting Sign in to GitHub · GitHub I’m consistently getting a 500 error across browsers. I’ve asked others to try it too and it’s happening to them as well.

I’m wondering if the repo has a misconfigured issue template (it’s using the new issue forms stuff) that is causing it to 500?

Even accessing the ISSUE_TEMPLATE folder with GitHub’s file browser results in an internal server error:


Something seems seriously broken. You should get in touch with support.