Fatal error: Uncaught Error: Class "Microsoft\Graph\Core\Requests\BaseBatchRequestBuilder" not found in /var/www/usonboard.com/vendor/microsoft/microsoft-graph/src/BatchRequestBuilder.php:25 Stack trace: #0 {main} thrown in /var/www/usonboard.com/vendor/microsoft/microsoft-graph/src/BatchRequestBuilder.php on line 25