Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in /home/angus/public_html/warmth/vendor/symfony/http-kernel/EventListener/CacheAttributeListener.php:28 Stack trace: #0 {main} thrown in /home/angus/public_html/warmth/vendor/symfony/http-kernel/EventListener/CacheAttributeListener.php on line 28