Error logging in to bitbucket with google account, tried a few times after refreshing browser cache.
Error 500, something went wrong.
This might be useful in debugging the problem
Issue #8614 was marked as a duplicate of this issue.
It looks like this is happening due to an error on Google's end. I'm able to log in with Google myself right now, and I'm no longer seeing this error reported on our servers. Can you confirm if you're still seeing this issue?