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