Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurationInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\monolog-bundle\DependencyInjection\Configuration.php:346 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\monolog-bundle\DependencyInjection\Configuration.php on line 346