Php 联邦快递警告：返回的费率类型使用请求的首选货币；优惠价格不予退还。拉维尔

当我想从联邦快递获得费率时，我收到了这个警告

"Severity" => "WARNING"
"Source" => "crs"
"Code" => "396"
"Message" => "The returned rate types are in the requested preferred currency; preferred rates not returned."
"LocalizedMessage" => "The returned rate types are in the requested preferred currency; preferred rates not returned."

我过去常常从联邦快递那里得到价格

控制器：

$rateRequest->RequestedShipment->ShippingChargesPayment->PaymentType = PaymentType::_SENDER;
$rateRequest->RequestedShipment->PreferredCurrency = 'USD';
$rateRequest->RequestedShipment->RateRequestTypes = [RateRequestType::_PREFERRED, RateRequestType::_LIST];

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你有试着问我吗？还没有。我现在就问。我想我不会得到答复。