Re: Forum – cannot post in old groups
Did you choose “Set up a new bbPress installation”” or “Use an existing bbPress installation”?
If you do not need any of the old bbPress content, then I would suggest starting the bbPress integration from scratch. This mean deleting the old and newly-created bbPress tables in the DB, then deleting the bbPress directory from BuddyPress, and then reinstalling the bbPress files. This of course also assumes that the new bbP tables do not yet have any worthwhile data in them.
Next, go back into WPMU’s backend and navigate to “BuddyPress > Forums Setup” and then choose “Set up a new bbPress installation”.
Does that make a difference?