Fatal error: Uncaught Error: Class 'GraphQL\Executor\Promise\Adapter\SyncPromise' not found in /home/mpolsk5/public_html/visibilityfuel.com/vendor/webonyx/graphql-php/src/Deferred.php:9 Stack trace: #0 {main} thrown in /home/mpolsk5/public_html/visibilityfuel.com/vendor/webonyx/graphql-php/src/Deferred.php on line 9