Fatal error: Uncaught Error: Class "HTMLPurifier_AttrDef" not found in D:\Apache24\www\xd_ccms\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\HTML\Bool.php:6 Stack trace: #0 {main} thrown in D:\Apache24\www\xd_ccms\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\HTML\Bool.php on line 6