ok, so for now i have commented out this line of code in WPLMS BAtches - filters.php and things are now working. We are going to check why this is causing issues.
add_action('groups_member_before_save',array($this,'seat_check'),10,2);
The batches addon is working fine now, thank you.
Ok, If you have any other doubt please create a new topic for that.
We are closing this topic now.