Fatal error: Uncaught Error: Class "HTMLPurifier_ChildDef_Required" not found in C:\PHP\APPS\dev\aictec_zonetec_web\vendor\ezyang\htmlpurifier\library\HTMLPurifier\ChildDef\Optional.php:10 Stack trace: #0 {main} thrown in C:\PHP\APPS\dev\aictec_zonetec_web\vendor\ezyang\htmlpurifier\library\HTMLPurifier\ChildDef\Optional.php on line 10