Fatal error: Uncaught Error: Class "core\task\adhoc_task" not found in /home/andinaes/public_html/aulavirtual/lib/classes/task/send_login_notifications.php:27 Stack trace: #0 {main} thrown in /home/andinaes/public_html/aulavirtual/lib/classes/task/send_login_notifications.php on line 27