Load more and wall posts not working

Hey all,
Love the work you guys do! I'm running WP4.2.3 and BuddyPress with the latest version of my BuddyBoss theme.

1. I am unable to posts to groups or to my own wall. It spins and then a "0" appears below the post box. Some users are having the same issue but some are able to post.

2. Same sort of issue with "load more" on the activity stream.

3. Same issue with pagination in the members directory.

Screenshot attached. If you would like to try and replicate the issue let me know and I'll set you up with a login.