changing authentication method here on ask.sagemath.org fails

Since myopenid [1] is history now, I have to find a different authentication method here on ask.sagemath.org. (I logged in at the end of January, so for a short time I'm able to ask here). The problem is, that "manage login methods" on my profile gives the following error message:

Internal server error
system error log is recorded, error will be fixed as soon as possible