[r-a-y]

@dains – if your WPMU installation is installed under “groups”, there will be a conflict with BuddyPress. Either try installing WPMU under the root or re-define the BP Groups slug.

Put this in your wp-config.php:
define ( 'BP_GROUPS_SLUG', 'gatherings' );

Change “gatherings” to whatever you want your groups to be called.

@cpmrgmt – try this:
https://buddypress.org/community/groups/how-to-and-troubleshooting/forum/topic/forum-replies-wont-stick/#post-49691