Cannot remove/re-add Samsung Smart TV in SmartThings

I recently had to factory recent my Samsung Smart TV, and since then SmartThings doesn’t recognize it. I was able to control it prior to the factory reset. So I tried to remove and re-add it, but no luck. It says it was successfully removed, but it stays in my list of things. When I try to remove the “Samsung Smart TV (Connect)” smart app, I get “an unexpected error occurred.” I’ve even tried removing the device and smartapp from the IDE, but no luck. Any suggestions? Thanks.