Fatal error: Uncaught Error: Class "HTMLPurifier_AttrDef" not found in E:\www\frey\qgmvc\v1.0\composer\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\HTML\Nmtokens.php:6 Stack trace: #0 {main} thrown in E:\www\frey\qgmvc\v1.0\composer\vendor\ezyang\htmlpurifier\library\HTMLPurifier\AttrDef\HTML\Nmtokens.php on line 6