Fatal error: Uncaught Error: Class "ilSelectInputGUI" not found in /var/www/html/ilias/components/ILIAS/Mail/classes/Form/class.ilMailTemplateSelectInputGUI.php:24 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Mail/classes/Form/class.ilMailTemplateSelectInputGUI.php on line 24