Fatal error: Uncaught ReflectionException: Class DreiscSeo\Subscribers\BackendSubscriber does not exist in /var/www/clients/client1/web2/web/engine/Shopware/Components/DependencyInjection/Compiler/EventSubscriberCompilerPass.php:64 Stack trace: #0 /var/www/clients/client1/web2/web/engine/Shopware/Components/DependencyInjection/Compiler/EventSubscriberCompilerPass.php(64): ReflectionClass->__construct('DreiscSeo\\Subsc...') #1 /var/www/clients/client1/web2/web/vendor/symfony/dependency-injection/Compiler/Compiler.php(102): Shopware\Components\DependencyInjection\Compiler\EventSubscriberCompilerPass->process(Object(Symfony\Component\DependencyInjection\ContainerBuilder)) #2 /var/www/clients/client1/web2/web/vendor/symfony/dependency-injection/ContainerBuilder.php(587): Symfony\Component\DependencyInjection\Compiler\Compiler->compile(Object(Symfony\Component\DependencyInjection\ContainerBuilder)) #3 /var/www/clients/client1/web2/web/engine/Shopware/Kernel.php(574): Symfony\Component\DependencyInjection\ContainerBuilder->comp in /var/www/clients/client1/web2/web/engine/Shopware/Components/DependencyInjection/Compiler/EventSubscriberCompilerPass.php on line 64