Fatal error: Uncaught Error: Class "core\event\base" not found in C:\Apache24\htdocs\moodle\admin\tool\mfa\factor\sms\classes\event\sms_sent.php:27 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\admin\tool\mfa\factor\sms\classes\event\sms_sent.php on line 27