Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in D:\svn\blog\vendor\symfony\http-kernel\EventListener\DisallowRobotsIndexingListener.php:23 Stack trace: #0 {main} thrown in D:\svn\blog\vendor\symfony\http-kernel\EventListener\DisallowRobotsIndexingListener.php on line 23