Caseta Switch seems to work but doesn't turn on lights
I recently tried to install a Caseta Switch (non dimmer) in place of a standard switch controlling our Christmas lights.When installed, the switch turns on and I can add it to Homekit, the LED turns green, etc. But the switch does not power on the Christmas lights (they are also controlled by a solar detector but the lights turn on when I put the old switch back in place).I've tested that I get voltage from the Hot/Black wire, and the Load/Red wire has no voltage until the switch is powered on. The blue wire is capped, the green wire is bound to the bare copper wires, and the white wire is bound to the two other beige/neutral wires.What can I do to troubleshoot this?