Hello, maybe there is a issue, because I have a problem with another plugin and the support tell me this:
I can see the issue now.
Your theme is not updated for BuddyPress 3.0+. BuddyPress 3.0 removed the legacy forums and a few functions.
The error is
Fatal error: Call to undefined function bp_is_group_forum() in [redacted path]/wp-content/themes/rehub/buddypress/groups/single/index.php on line 48
It happens if a theme is not updated for BuddyPress 3.0+ . To fix it, you will need to edit
and remove the code that looks like
// Old group forums
elseif ( bp_is_group_forum() ) : bp_get_template_part( 'groups/single/forum' );
That will fix it.