Fatal error: Uncaught Error: Class "HTMLPurifier_AttrDef" not found in D:\NTG_App\www\store_management_system\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\Clone.php:7 Stack trace: #0 {main} thrown in D:\NTG_App\www\store_management_system\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\Clone.php on line 7