AdminCP: That action could not be completed.
 

Hi,

i bought another license yesterday.

I already run 3 vB 5 on the same server without trouble.

After installing the new license (without problem / fresh install), i'm able to view the forums and are able to login.

I see the ADMIN-Link in the Footer, after clicking on it,i get the Admin-Login.
But after entering the Userdata, it says: That action could not be completed. Please try again, and if this occurs again please contact the system administrator and tell them how you got this message.

I wiped the site from the server controlpanel, checked the configs several times, tried different cookie-settings... No luck. So i am stuck.

Any ideas?

Greets and thanks,
Alex