Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventDispatcherInterface" not found in /var/www/unitedcomputerservice.com/htdocs/wp-content/plugins/gantry5/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcherInterface.php:21 Stack trace: #0 {main} thrown in /var/www/unitedcomputerservice.com/htdocs/wp-content/plugins/gantry5/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcherInterface.php on line 21