Hampton Bay Zigbee Fan Controller stopped working in Smartthings

I haven’t had any issue for a year until all the sudden, my Hampton Bay zigbee fan controller stopped working in SmartThings.

I have another one of these in another room and it still works fine.

The “thing” is still there in SmartThings, but I can’t control it in SmartThings.

It can only control it with the Hampton Bay controller that came with it.

I tried flipping the breaker and power cycling the hub, still won’t work.

How do I get SmartThings to control it again? It’s been so long since I set it up that I don’t remember what to do.