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