Red Dimmer Switch Wiring Help

Not sure what’s going wrong here but wiring this dimmer switch keeps tripping the breaker.

I have three wires in my box, black white and ground. How am I supposed to be wiring this thing? New user so cant post pictures I guess?

Trying to power 3 led under cabinet lights. Previous smart switch worked fine (different company).

What am I doing wrong here guys?

So if I understand you correctly, you only have 2 conductors plus a ground in the switch box?

Do you have a meter?

Romex or single conductors?