Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Definition\ConfigurationInterface' not found in /home/soh-works/www/Stepup/vendor/sensio/framework-extra-bundle/src/DependencyInjection/Configuration.php:24 Stack trace: #0 {main} thrown in /home/soh-works/www/Stepup/vendor/sensio/framework-extra-bundle/src/DependencyInjection/Configuration.php on line 24