EOS 77D Can't Use Remote Shooting

[MarkSH26]

I have a Canon 77D. I used remote shooting from the Canon Connect App about a month ago, but now I get the error message "Cannot use this function with the current settings on this camera for images viewable via connection."

I can download images. I tried "Clear settings" in wrench 4 (I had to fix the settings for Bluetooth and Wifi afterward.), but this did not help. I also tried deleting and reinstalling the Canon Connect App. I've read several articles on this site and couldn't find any other ideas. I don't think that a firmware update would help since it did work a month ago and I'm not aware of any changes since then.

I have the camera set to P and one-shot, no delay. I have also used a 2-second delay when remote shooting worked.

Thanks for any help,
Mark

I reposted here from cameras.

[Tronhard]

Do you have back button focus enabled?   Remote shooting will not work unless focus via the shutter button is enabled.  I had another poster with this issue.  I got her to set up C1 with shutter button focus and it worked for her.  When not requiring remote control she could use any other setting that was still using BBF as before.