"SEGMENT_KEYS_NOT_FOUND" I do not see any reference of this anywhere. Any idea what this means?

{
  "type": "error.SuiteScriptError",
  "name": "SEGMENT_KEYS_NOT_FOUND",
  "message": "Could not find segment keys for prod",
  "stack": [
    "createError(N/error)",
    "getAuthorizationKeyLambda(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/segment/segment.js:74)",
    "getSegmentHeadersLambda(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/segment/segment.js:106)",
    "sendSegmentRequestLambda(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/segment/segment.js:171)",
    "track(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/segment/segment.js:212)",
    "track(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/segment/mm_segment_lib_track.js:378)",
    "sendSegmentTrack(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/smsshooter/sms_shooter.js:536)",
    "sendMessage(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/smsshooter/sms_shooter.js:482)",
    "doAfterSubmit(/SuiteApps/com.mfouruau.mmsdfmbow/MessageMedia2/modules/workflowmanager/suitescripts/userevent/mm_workflow_ue.js:219)",
    "createError(N/error)"
  ],
  "cause": {
    "name": "SEGMENT_KEYS_NOT_FOUND",
    "message": "Could not find segment keys for prod"
  },
  "id": "",
  "notifyOff": false,
  "userFacing": true
}

I would reach out to the SDN partner Message Media, my un-informed guess would be a config or license issue. The error is custom for their module not an NS error