Philips Hue Dimmer Switch V2

Okay, people using smartthings had the same problem and the user mvevitsis was so kind to provide a new device handler for the dimmer switch v2:

I tried to simply use sticks18 code and put in the new fingerprint, which does not work:
https://raw.githubusercontent.com/xxKeoxx/hubitat/master/device_drivers/HueDimmer.groovy

The device pairs and finds the device handler, but it shows up 3 times with different IDs and first I can push buttons and the App shows me the correct numbers, but after a few seconds this is not the case anymore and the switch just blinks orange after pressing a button.

Since I am not coding and cannot find information, which I ad hoc understand, to adapt the code, I hope somebody else is so kind and might help me with this?