Fatal error: Uncaught Error: Interface "TYPO3\CMS\Install\Updates\UpgradeWizardInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/wazum/sluggi/Classes/Upgrade/SlugLockUpgradeWizard.php:15 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/wazum/sluggi/Classes/Upgrade/SlugLockUpgradeWizard.php on line 15