Fatal error: Uncaught Error: Class "core\task\scheduled_task" not found in /home/edepracl/public_html/moodle30/lib/classes/task/plagiarism_cron_task.php:29 Stack trace: #0 {main} thrown in /home/edepracl/public_html/moodle30/lib/classes/task/plagiarism_cron_task.php on line 29