Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Event' not found in /home/cooplafobq/newplanning/vendor/liip/imagine-bundle/Events/CacheResolveEvent.php:16 Stack trace: #0 {main} thrown in /home/cooplafobq/newplanning/vendor/liip/imagine-bundle/Events/CacheResolveEvent.php on line 16