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