I am using Tersus theme from ThemeForest (which is advertised as BuddyPress theme).
My permalinks are set to postname.
BuddyPress is installed , to create forum it’s asking to install bbpress.
So the bbpress (without the BuddyPress) forum works.
But when I go to the BuddyPress newly created pages (groups, forums,members) I get those problems. Can’t create groups, can’t create forum, can’t send private message to memebers. Error message :There was an error saving group details, please try again.