Fatal error: Uncaught Error: Class 'core\task\scheduled_task' not found in /home/www/unicornvirtualmedievalmuseum.org/mod/assign/feedback/editpdf/classes/task/convert_submissions.php:37 Stack trace: #0 {main} thrown in /home/www/unicornvirtualmedievalmuseum.org/mod/assign/feedback/editpdf/classes/task/convert_submissions.php on line 37