Fatal error: Uncaught Error: Interface "ilSkillUserLevelRepository" not found in /var/www/html/ilias/components/ILIAS/Skill/Level/class.ilSkillUserLevelDBRepository.php:22 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Skill/Level/class.ilSkillUserLevelDBRepository.php on line 22