Fatal error: Uncaught Error: Class "GraphQL\Executor\Promise\Adapter\SyncPromise" not found in /var/www/crm_killing_ninja/vendor/webonyx/graphql-php/src/Deferred.php:10 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/vendor/webonyx/graphql-php/src/Deferred.php on line 10