I've had a switch turn on my living room lights for over a year with no problem.  Today, however, it will not turn on the lights either in the app or at the physical toggle switch.  The app shows the light as on and off but the lights don't come on.  The switch itself doesn't have any unusual flashing lights or anything.

I've updated the firmware on all of my switches and plugs.  This did not solve the problem. The above represents the current firmware version.

One thing I noticed is that, while the Kasa app recognizes the switch, Alexa says it's unresponsive.

I've also tried a reset.  I've deleted the plug from the app and re-added.  No luck

Does the switch itself need to be replaced?