It sends me to the admin login of admincp/index.php requesting that you login. Thing is it won't take my superadmin user, despite being the one I was logged in with. So it gives the error. "To continue this action, login using the admin account that initiated the action."
Everything post-upgrade looks fine. I can even get into the acp, it says it's updated to 4.0.5 as well. So.. just wondering when i manually access admin cp does this rule over the need for the above?