Fatal error: Uncaught Error: Class 'HTMLPurifier_AttrDef_HTML_Pixels' not found in E:\xampp\htdocs\webhost_v3\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\HTML\Length.php:10 Stack trace: #0 {main} thrown in E:\xampp\htdocs\webhost_v3\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\HTML\Length.php on line 10