Thanks - indeed it was connected to my iPad. I have been having sporadic Hub offline issues, and not sure it’s related, so I just turned Bluetooth off on my iPad just to see if that makes any difference.
I had the same issue. I wanted to switch to WiFi with a green light replacing the blue one.
The app requires you to pick a wifi network and password. I had to take the MANUAL settings option. and type in the SSID rather than picking it from a list.