Hilfe erbeten. Was ist zu tun? Diese Fehlermendung erscheint beim Aufruf der Back-and-einwahl. Fatal error: Uncaught InvalidArgumentException: [ERROR 1871] Element ‚{http://symfony.com/schema/dic/services}defaults‘: This element is not expected. Expected is ( {http://symfony.com/schema/dic/services}service ). (in /var/www/clients/client7981/web15003/web/ - line 8, column 0) in /var/www/clients/client7981/web15003/web/vendor/symfony/config/Util/XmlUtils.php:101 Stack trace: #0 /var/www/clients/client7981/web15003/web/vendor/symfony/dependency-injection/Loader/XmlFileLoader.php(284): Symfony\Component\Config\Util\XmlUtils::loadFile(‚/var/www/client…‘, Array) #1 /var/www/clients/client7981/web15003/web/vendor/symfony/dependency-injection/Loader/XmlFileLoader.php(41): Symfony\Component\DependencyInjection\Loader\XmlFileLoader->parseFileToDOM(‚/var/www/client…‘) #2 /var/www/clients/client7981/web15003/web/engine/Shopware/Components/Plugin.php(225): Symfony\Component\DependencyInjection\Loader\XmlFileLoader->load(‚/var/www/client…‘) #3 /var/www/clients/client7981/web15003/web/engine/Shopware/Components/Plugin.php(1 in /var/www/clients/client7981/web15003/web/vendor/symfony/dependency-injection/Loader/XmlFileLoader.php on line 286