Fatal error: Uncaught Error: Class 'HTMLPurifier_HTMLModule' not found in /var/www/app/appregwebservice/vendor/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php:3 Stack trace: #0 {main} thrown in /var/www/app/appregwebservice/vendor/ezyang/htmlpurifier/library/HTMLPurifier/HTMLModule/XMLCommonAttributes.php on line 3