Fatal error: Uncaught Error: Class 'HTMLPurifier_Definition' not found in /home/edmedu/www/mig.edmclass.com/admin.edmclass.com/vendor/ezyang/htmlpurifier/library/HTMLPurifier/CSSDefinition.php:7 Stack trace: #0 {main} thrown in /home/edmedu/www/mig.edmclass.com/admin.edmclass.com/vendor/ezyang/htmlpurifier/library/HTMLPurifier/CSSDefinition.php on line 7