Fatal error: Uncaught Error: Class "core\task\adhoc_task" not found in C:\Apache24\htdocs\moodle\communication\classes\task\add_members_to_room_task.php:29 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\communication\classes\task\add_members_to_room_task.php on line 29