Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Definition\ConfigurationInterface' not found in /home/almasai/www/people/_old_site/vendor/AppVentus/BlogBundle/DependencyInjection/Configuration.php:13 Stack trace: #0 {main} thrown in /home/almasai/www/people/_old_site/vendor/AppVentus/BlogBundle/DependencyInjection/Configuration.php on line 13