Fatal error: Uncaught Error: Class 'HTMLPurifier_AttrTransform' not found in C:\xampp\htdocs\finance\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrTransform\SafeEmbed.php:3 Stack trace: #0 {main} thrown in C:\xampp\htdocs\finance\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrTransform\SafeEmbed.php on line 3