Fatal error: Uncaught Error: Class 'HTMLPurifier_AttrDef_URI_IPv4' not found in E:\xampp\htdocs\webhost_v3\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\URI\IPv6.php:9 Stack trace: #0 {main} thrown in E:\xampp\htdocs\webhost_v3\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\URI\IPv6.php on line 9