I have the latst G4AR gateway ! Unable to turn off Wifi.

My network is all wired and I have free wifi if I need it in our small rv retirement park. I read about the "Hint" control here but when I go to turn off the 5 ghz toggle it tells me it is unable to do that because it will cause the gateway to hang during a reboot. Any work arounds for that ? Thanks and God bless.