Fatal error: Uncaught Error: Interface "Psr\Container\ContainerInterface" not found in /users/energydata/www/volkszaehler.org/vendor/symfony/service-contracts/ServiceProviderInterface.php:22 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/symfony/service-contracts/ServiceProviderInterface.php on line 22