XF 2.1 Can't login in to admin portal after upgrade

[fredrikse]

Hi, November last year I did a test upgrade to Xenforo 2.1. That worked pretty good. After the upgrade I was able to login to the portal with my admin user. Now today I did the same test upgrade (to finalize the upgrade plan and check everything). But now I'm not able to login to the admin portal with my admin user. Any know issues here I should be aware of?

 

[fredrikse]

Now all of a sudden it seems to work. I can login again. Strange.