Fatal error: Uncaught Error: Class "ilBlockGUI" not found in /var/www/html/ilias/components/ILIAS/Poll/classes/BlockGUI/class.ilPollBlockGUI.php:34 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Poll/classes/BlockGUI/class.ilPollBlockGUI.php on line 34