Climate not working with Local Fulfillment

[cdemi]

Hi team,

I am trying to debug an issue where for it looks like Local Fulfillment is working correctly, except for the climate domain entities.

According to the Google Cloud Console Logs, when I try to turn off the Air Conditioner for example:

{
  "insertId": "63uq43f4jxs1m",
  "jsonPayload": {
    "executionLog": {
      "executionResults": [
        {
          "requestId": "9699777615650801472",
          "executionType": "PARTNER_CLOUD",
          "latencyMsec": "1215",
          "actionResults": [
            {
              "action": {
                "trait": "TRAIT_ON_OFF",
                "actionType": "ONOFF_OFF"
              },
              "status": {
                "statusType": "PARTNER_RESPONSE_MISSING_PAYLOAD",
                "isSuccess": false,
                "externalDebugString": "JSON payload missing."
              },
              "device": {
                "deviceType": "THERMOSTAT"
              }
            }
          ]
        }
      ]
    },
    "locale": "en-US"
  },
  "resource": {
    "type": "assistant_action_project",
    "labels": {
      "project_id": "home-assistant-310216"
    }
  },
  "timestamp": "2024-09-20T13:31:07.461790817Z",
  "severity": "ERROR",
  "logName": "projects/home-assistant-310216/logs/assistant_smarthome%2Fassistant_smarthome_logs",
  "receiveTimestamp": "2024-09-20T13:31:07.461790817Z"
}

I wonder if someone could guide me on how I can troubleshoot this to find out what actually isn't working and how to fix it