Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in C:\WebServer\htdocs\bookshelf\vendor\symfony\http-kernel\EventListener\CacheAttributeListener.php:28 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\symfony\http-kernel\EventListener\CacheAttributeListener.php on line 28