3-way electrolux fridge - electronic ignition doesn't work?

Hi, any help with this qn greatly appreciated. We bought a 2nd-hans camper for a European trip, and 1 week in the electronic ignition for the gas fridge stopped firing.

I am guilty of one mistake - we drove for a few minutes with the gas on, though we then turned it off and I don't think this should have caused the problem - but the igniter hasn't worked since.

I've looked at the fuses in the Zig box which look fine, and also tried to get to the wiring behind the switch - was a bit difficult but it looked ok.

Please help!