Fatal error: Uncaught Error: Class "ApiPlatform\Metadata\GraphQl\Operation" not found in /var/www/html/API_Forum/vendor/api-platform/metadata/GraphQl/Mutation.php:17 Stack trace: #0 {main} thrown in /var/www/html/API_Forum/vendor/api-platform/metadata/GraphQl/Mutation.php on line 17