Fatal error: Uncaught Error: Class 'HTMLPurifier_Exception' not found in /opt/lampp/htdocs/plugin/htmlpurifier/standalone/HTMLPurifier/ConfigSchema/Exception.php:6 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/plugin/htmlpurifier/standalone/HTMLPurifier/ConfigSchema/Exception.php on line 6