Fatal error: Uncaught Error: Interface "Magento\Framework\GraphQl\Query\ResolverInterface" not found in /var/www/magento/html/app/code/BBNT/GiftCardGraphQl/Model/Resolver/GiftCardBalance.php:8 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/BBNT/GiftCardGraphQl/Model/Resolver/GiftCardBalance.php on line 8