I’m not exactly sure what happened, but I successfully logged in with github yesterday on one page, but afterward have not been logged in and have gotten ‘Oops, an unexpected error occurred’ whenever I try to log-in again on this computer. I am guessing I could fix the issue by clearing some browser state or logging out/in from Github, but figure I might leave it as is for a bit in case there’s a way to help you folks debug. (Maybe something to do with the domain dropping beta.?)
We did recently deploy a change to authentication cookies that could cause this problem (lost changes). If you clear your (Observable) cookies and sign in again, it should fix itself.
Yes, that fixed it, as expected.