商户是普通直连商户

微信云开发微信支付调用统一下单API CloudPay.unifiedOrder() 报“受理关系不存在”要怎么配置？

请求：

请求：

res = await cloud.cloudPay.unifiedOrder({

      "body": "活动费用",

      "outTradeNo": tradeNo,

      "spbillCreateIp": "127.0.0.1",

      "subMchId": "1589937461",

      "totalFee": event.activity_amt,

      "envId": cloud.DYNAMIC_CURRENT_ENV,

      "functionName": "wechatNotice"

    })

响应：

{"payment":{"timeStamp":"1591006435","nonceStr":"","package":"prepay_id=","signType":"MD5","paySign":"4354568EC879797517096FC53C28AA32"},"returnCode":"FAIL","returnMsg":"受理关系不存在","errCode":0,"errMsg":"cloudPay.unifiedOrder:ok"}