Fatal error: Uncaught Error: Interface "Nuwave\Lighthouse\Subscriptions\Contracts\Broadcaster" not found in /home/tgmart/public_html/api/vendor/nuwave/lighthouse/src/Subscriptions/Broadcasters/EchoBroadcaster.php:12 Stack trace: #0 {main} thrown in /home/tgmart/public_html/api/vendor/nuwave/lighthouse/src/Subscriptions/Broadcasters/EchoBroadcaster.php on line 12