Fatal error: Uncaught Error: Interface 'Symfony\Component\Mercure\HubInterface' not found in /home/gmcguire/public_html/concrete5/concrete/vendor/symfony/mercure/src/Debug/TraceableHub.php:30 Stack trace: #0 {main} thrown in /home/gmcguire/public_html/concrete5/concrete/vendor/symfony/mercure/src/Debug/TraceableHub.php on line 30