API下单提示"ERR-TICOM-ORDER-API-KNV-0503",

 },
  "errors": [
    {
      "errorCode": "ERR-TICOM-ORDER-API-KNV-0503",
      "type": "Validation",
      "section": null,
      "field": null,
      "reason": "Unable to validate order",
      "message": "The order could not be completed at this time",
      "data": null
    }
  ]
}

我刚刚重新试了下，还是提示503，请这样改怎么解决，怎么联系TI CSC。