Fatal error: Uncaught Error: Class "HTMLPurifier_AttrTransform" not found in D:\NTG_App\www\store_management_system\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrTransform\Border.php:6 Stack trace: #0 {main} thrown in D:\NTG_App\www\store_management_system\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrTransform\Border.php on line 6