I'm trying to change my primary OpenID ( on my Super User account) from MyOpenID to Stack Exchange. Went over to my profile, clicked on "Change OpenID", and selected Login with Stack Exchange. Instead of logging in, I got the below error message:
Could Not Find Pending Authentication Request
We were unable to find the pending authentication request, and cannot resume login.
If you believe you encountered this message in error, please report it.
Trying to login again using StackExchage OpenID, I get only a "login" button, followed by "Page not found"