Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Event" not found in /home/astechc1/public_html/vendor/liip/imagine-bundle/Events/CacheResolveEvent.php:24 Stack trace: #0 {main} thrown in /home/astechc1/public_html/vendor/liip/imagine-bundle/Events/CacheResolveEvent.php on line 24