I wanted to link a new repository to link issues and PRs so I went into the powerup settings to do that. However clicking on the button brought up what seemed like an OAuth page on Github except it's a 404. Can't do anything. Trying to link an issue from the repo I already had connected does the same thing.
I tried a couple different browsers (edge, chrome, firefox) and incognito. Eventually I cleared the powerup data and tried to re-link fresh. Same thing. The powerup is DOA. I can't auth to Github through the 404 so I can't do anything at all now.