Fatal error: Uncaught Error: Class "core\task\adhoc_task" not found in C:\Apache24\htdocs\moodle\admin\tool\moodlenet\classes\task\send_enable_notification.php:28 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\admin\tool\moodlenet\classes\task\send_enable_notification.php on line 28