BuddyPress.org

Michael-

The problem is, that it is a WPMU-Message

Why do you say it is a WPMU error message? Have you tried the process in different browsers and received the same message? Or, do you just see this message in Internet Explorer?

If it occurs in other browsers, then it could be an issue with a nonce field.

Sgrunt indicated that this message only occurred in IE. If your issue is not the same as Sgrunt’s, you should start a new thread.