Fatal error: Uncaught Error: Interface "Nuwave\Lighthouse\Subscriptions\Contracts\SubscriptionIterator" not found in /home/tgmart/public_html/api/vendor/nuwave/lighthouse/src/Subscriptions/Iterators/SyncIterator.php:8 Stack trace: #0 {main} thrown in /home/tgmart/public_html/api/vendor/nuwave/lighthouse/src/Subscriptions/Iterators/SyncIterator.php on line 8