Hi @ManfredS sorry - I keep forgetting about the gson requirement. I guess you’re running OH 2.4 still, not one of the 2.5 snapshots?
You can install gson 2.8 by following the instructions at [SOLVED] Manually Upgrade com.google.gson from 2.7.x to 2.8.x in OH 2.4
Or, I can see if I can figure out how to rebuild the binding targeting OH 2.4
Cheers,
Paul.