Fatal error: Uncaught Error: Class "ilUserAvatarBase" not found in /var/www/html/ilias/components/ILIAS/User/classes/Avatar/class.ilUserAvatarLetter.php:26 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/User/classes/Avatar/class.ilUserAvatarLetter.php on line 26