Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurationInterface" not found in /home/zdpktgd/ptc/vendor.old/symfony/monolog-bundle/DependencyInjection/Configuration.php:380 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/monolog-bundle/DependencyInjection/Configuration.php on line 380