Hey, 

I was trying to install a three way in my house and the traveller screw on the kasa switch accidentally touched the box and resulted to a spark. Turned the power off and inspected the box. Nothing serious happened but when I put the switch in properly and power everything back on, now the switch won't do anything. Lights come on, wifi is trying to connect, but the lights themselves do not change. 

Any idea what happened? Did I Fry the switch?