Fatal error: Uncaught Error: Interface "Extcode\Cart\Event\CheckProductAvailabilityEventInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/extcode/cart/Classes/Event/CheckProductAvailabilityEvent.php:18 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/extcode/cart/Classes/Event/CheckProductAvailabilityEvent.php on line 18