Fatal error: Uncaught Error: Class "ilUserAutoComplete" not found in /var/www/html/ilias/components/ILIAS/OnScreenChat/classes/class.ilOnScreenChatUserUserAutoComplete.php:25 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/OnScreenChat/classes/class.ilOnScreenChatUserUserAutoComplete.php on line 25