Error Message

{
  "errors": [
    {
      "message": "Only one of bodyHtml or bodyHtmlFileReference can be provided.",
      "extensions": {
        "errorType": "VALIDATION",
        "errorDescription": "An HTML email body can be provided either inline via bodyHtml or as a reference to a pre-uploaded file via bodyHtmlFileReference, but not both.",
        "errorCode": "KT-CT-14224"
      }
    }
  ]
}