Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Definition\ConfigurationInterface' not found in /home/almasai/www/people/_old_site/vendor/symfony/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php:31 Stack trace: #0 {main} thrown in /home/almasai/www/people/_old_site/vendor/symfony/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php on line 31