Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurationInterface" not found in /home/flighto/e-commerce/vendor/sylius/theme-bundle/src/DependencyInjection/Configuration.php:21 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sylius/theme-bundle/src/DependencyInjection/Configuration.php on line 21