NoCard 결제 취소 XPayClient 호출 오류 질문

{
    "responseCode": "20201",
    "message": "",
    "responseDate": null,
    "cancelRequestDate": null,
    "timestamp": null,
    "hashData": null,
    "cancelDiscountAmount": null,
    "payType": null,
    "merchantId": null,
    "orderId": null,
    "transactionId": null,
    "resRemainAmount": null,
    "partialCancelSeqNo": null,
    "casSeqNo": null,
    "isSuccess": false,
    "rawData": {
        "success": "False",
        "m_szResCode": "20201",
        "m_szResMsg": ""
    }
}