
Are you getting this error message thrown when you submit a response to a topic or trying to send a PM? This is evidently a bug in the new forum configuration, probably lurking in the new server rather than in the software being used to generate and maintain the forum. So we can rout it out, the Team would appreciate your reporting when you had this error thrown and what you were doing at the time.
It's unlikely to be caused by individual users' configurations, but just in case, let us know what computer, OS, and browser program you were using.
And, obviously, if you're finding other forum capabilities malfunctioning, please let the Team know at once.