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. 

[fxdrider]

I had already thought about the hotshoe contacts before posting. I checked and they seemed to be lining up. I also asked this question over on the Facebook Canon EOS R7 group, and got the following answer:

"Check if you are in mechanical shutter will not work in electronic shutter".

Sure enough, I was on electronic shutter. So I set it to mechanical shutter, and voila! Now I'm able to get into the 2 menus I was locked out of.  I finished setting up my choices in those menus, and for giggles I went and set the camera back to electronic shutter, 1st curtain. Now, I can still access those menu items.

I have no clue why it wouldn't let me in those menus when I first tried, but it will now. Perhaps firmware glitch? I didn't see anything in the manual about having to be set to mechanical shutter to get into the flash functions settings, but I suppose I could've missed it. I just hope it doesn't happen again.

Thanks Demetrius.