I was able to connect it to my 5GHz ssid by:
Pushing the wifi reset button on the controller
Having the app wifi direct to the controller and at that point it sits and doesn’t do anything
While the app spins trying to talk to the controller, I push the wifi reset button again and that does the trick
It refuses to connect to anything 2.4GHz. I’m on an Asus AC68U router. My segmented guest wireless network is where my IoT things go but it’s 2.4GHz. No solution as of yet.