Fatal error: Uncaught Error: Interface "Psr\EventDispatcher\StoppableEventInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/extcode/cart-products/Classes/Event/RetrieveProductsFromRequestEventInterface.php:20 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/extcode/cart-products/Classes/Event/RetrieveProductsFromRequestEventInterface.php on line 20