test error

I try the quick start for php
https://backendless.com/mobile-developers/quick-start-gu3452D357-1D03-8C47-FF21-C486C33D2D00ide-for-php/
I use #7,#8 code. I use cloud server.
$registered_user = Backendless::$UserService->register( $user );
have the following error.
Fatal error: Uncaught exception ‘backendless\exception\BackendlessException’ with message ‘Backendless API return error: Unable to register user. Property ‘name’ is required. Error code:3012’ in C:\xampp\htdocs\backendless\backendless\src\lib\RequestBuilder.php:162 Stack trace: #0 C:\xampp\htdocs\backendless\backendless\src\lib\RequestBuilder.php(68): backendless\lib\RequestBuilder::handleError(Object(backendless\lib\HttpRequest)) #1 C:\xampp\htdocs\backendless\backendless\src\lib\RequestBuilder.php(41): backendless\lib\RequestBuilder::doRequestByUrl(‘https://api.bac…’, Array, ‘POST’) #2 C:\xampp\htdocs\backendless\backendless\src\services\UserService.php(41): backendless\lib\RequestBuilder::doRequest(‘users’, ‘register’, Array) #3 C:\xampp\htdocs\backendless\test1.php(27): backendless\services\UserService->register(Object(backendless\model\BackendlessUser)) #4 {main} thrown in C:\xampp\htdocs\backendless\backendless\src\lib\RequestBuilder.php on line 162

what does this means? I am sure I use right keys.

Thanks

it is fixed