Fatal error: Uncaught Error: Class "HTMLPurifier_ChildDef" not found in C:\xampp\htdocs\shopLogic\vendor\ezyang\htmlpurifier\library\HTMLPurifier\ChildDef\Custom.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\shopLogic\vendor\ezyang\htmlpurifier\library\HTMLPurifier\ChildDef\Custom.php on line 9