KYC update problem

Hello, guys!

I am trying to update the KYC document like this written in the documentation:

$KycDocument->Type = "IDENTITY_PROOF";
$Result = $mainmp->create_kyc_document($UserId, $KycDocument); // returns KYC document
$Page = $mainmp->create_kyc_page_from_file($UserId, $Result->Id, $file); // returns true

$KycDocument->Status = \MangoPay\KycDocumentStatus::ValidationAsked; 
$ResultUpdate = $mainmp->update_kyc_document($UserId, $KycDocument); // returns error

But I am getting this error:

Fatal error: Uncaught MangoPay\Libraries\ResponseException: Method not allowed. The requested resource does not support http method 'PUT'. in /sdk/MangoPay/Libraries/RestTool.php:366
Stack trace:
#0 /sdk/MangoPay/Libraries/RestTool.php(152): MangoPay\Libraries\RestTool->CheckResponseCode(405, Object(stdClass))
#1 /sdk/MangoPay/Libraries/ApiBase.php(346): MangoPay\Libraries\RestTool->Request('/users/96113714...', 'PUT', Array)
#2 /sdk/MangoPay/ApiUsers.php(282): MangoPay\Libraries\ApiBase->SaveObject('kyc_documents_s...', Object(MangoPay\KycDocument), '\\MangoPay\\KycDo...', 96113714)

Please, help.