Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in /home/eberhardschwarze/public_html/vendor/friendsofsymfony/http-cache-bundle/src/EventListener/UserContextListener.php:34
Stack trace:
#0 {main}
thrown in /home/eberhardschwarze/public_html/vendor/friendsofsymfony/http-cache-bundle/src/EventListener/UserContextListener.php on line 34