Cannot install Mill heater on HomeKit

I'm a very beginner to Homebridge, I literally installed it today, so I need to learn how it works fully.

I have a heater from Mill, so I installed the plugin and managed to see the widget with the current temperature in my Home app but it says 'No response'. I tried switching between auto, heat and off but it does not work with the heater.

It's running on Mac OS and Node.js v18.15.0. This is the error I got.

[3/20/2023, 3:04:11 PM] Homebridge v1.6.0 (HAP v0.11.0) (Homebridge 550A) is running on port 51791.
[3/20/2023, 3:05:03 PM] [millheat] MillHeater[API] Couldn't perform command:error: { errorCode: 500, error: invalid parameters, subDomain length and physicalId length or deviceId should be greater than 0, and reqMsg should not be null, description: undefined }
[3/20/2023, 3:05:03 PM] Error: error: { errorCode: 500, error: invalid parameters, subDomain length and physicalId length or deviceId should be greater than 0, and reqMsg should not be null, description: undefined }
    at command (/usr/local/lib/node_modules/homebridge-mill-heater/node_modules/millheat-api/dist/bundle.js:82:21)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at Mill._command (/usr/local/lib/node_modules/homebridge-mill-heater/node_modules/millheat-api/dist/bundle.js:142:16)
    at Mill.setPower (/usr/local/lib/node_modules/homebridge-mill-heater/node_modules/millheat-api/dist/bundle.js:219:14)
[3/20/2023, 3:05:03 PM] Got SIGTERM, shutting down Homebridge...
[3/20/2023, 3:05:08 PM] [HB Supervisor] Homebridge Process Ended. Code: 143, Signal: null

After this, Homebridge restarts and configures the heater without an error. Then the same errors happen again when controlling from the Home app.

I've been using the Mill app too, and because of that, I guess, I see two same widgets with different names (one is just a number, and another one is something I named in the mill app). When I unpaired the heater from the mill app, one with the name is gone.

So my questions are,

- How can I fix the errors?

- Is it possible to use the Mill app while using Homebridge? I want to keep the mill app to control the heater properly. I want only to use the HomeApp to power on and off.

Thanks for your help