Fatal error: Uncaught Error: Class "GraphQL\Server\Helper" not found in /home/v5ylnh3uow4c/public_html/wp-content/plugins/wp-graphql/src/Server/WPHelper.php:12 Stack trace: #0 {main} thrown in /home/v5ylnh3uow4c/public_html/wp-content/plugins/wp-graphql/src/Server/WPHelper.php on line 12