Cannot set Speedlite 430EX III-RT Flash Functions or Flash C.Fn on EOS R7

[fxdrider]

New EOS R7 camera. With Speedlite 430EX III-RT mounted and powered ON, I cannot set Flash Functions or Flash C.Fn from the menu screen. When I click on the menu item for either setting I get a camera message that tells me the flash is either off or not compatible. Does anyone here know what the issue is, and what the fix would be?   This same flash unit works perfectly on my Canon EOS 90D.

Thanks.

[deebatman316]

How far are you sliding the speedlite in the hot shoe. If you slide it in too far you can get that message too or not far enough. I've used my old and new speedlites in the hot shoe of newer multi function hot shoe cameras and they work just fine.