My problem is very similar to the one described in this question, but it was marked "Fixed" and I'm still having this problem.
I am not able to log into stackexchange.com, other StackExchange sites on subdomains of stackexchange.com, or others like serverfault.com with Clickpass.
I receive the message:
Unable to log in with your OpenID provider: No OpenID endpoint found.
Clickpass seems to be working just fine, as I just logged into another site with it. I'm still logged into stackoverflow and meta.stackoverflow with clickpass, but it looks like my serverfault account doesn't have my alternate Google openid associated with it, because when I try to log in using Google, it brings me to the "hey, we don't recognize you, want to create an account?" screen. But I don't want to do that.
I tried using both the Clickpass button and typing in
Please help! I don't want to lose my StackExchange accounts for the ones that I haven't associated an alternate openid with.