Tado broke my boiler?

Is there a possibility that Tado broke my boiler (a Thermomaster 3hr)? I installed the Tado setup with a few TRV's and a wired tado thermostat this summer. The thermostat required 2 wires to be connected from the wall.

So tonight we fired up our setup for the first time and it worked well for about an hour, until suddenly the heating stopped. I went to go check on the boiler and no signs of life. I tried resetting it and replugging it into the socket but no luck. Completely dead.

What happened and what am I supposed to do? Could it be that I switched up those two wires in the thermostat and that blew a fuse or completely broke the boiler even? The heating was working perfectly for about an hour before things broke.