Fatal error: Uncaught Error: Class 'HTMLPurifier_AttrTransform' not found in /var/www/html/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/EnumToCSS.php:7 Stack trace: #0 {main} thrown in /var/www/html/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrTransform/EnumToCSS.php on line 7