Rooted Toon Boiler Status integration

Hi everyone,
I have just rooted my Toon and have successfully added the great Toon integrations by Cyberjunky (Smart Meter, Boiler Status, Climate).
Smart Meter and Climate work like a charm and I can monitor electricity and gas used as well as controlling the heating.
But for some reason the Boiler Status is only showing “UNKNOWN” instead of values for the different readings.

I followed the installation instructions but cannot get this to work.
I am rather new to Home Assistant so maybe I have missed something somewhere but it would be great if someone could give me a hint what to do to get this working.