Thru Axle snapped during installation to wahoo kickr core.

I have a Ridley Fenix Slic -roadbike (carbon frame), that i tried to install to my new Kickr Core. I used the right adapteri (142mm) and screwed it in with a torque wrench. I had no idea how tight i should be, so i just kept making it tighter. Then the Thru Axle snapped in between the frame and the cassette. How come this happened? Is my bike not compatible? Is the carbon frame still ok? It's getting fixed at a shop.