Newly updated app reporting "The selected key does not belong to . Please select another key." in ERA

ERA is working fine except for one watch face that I recently updated.  For that watch face, it reports "Newly updated app reporting "The selected key does not belong to <AppName>. Please select another key."

I would think it's some sort of corruption of my ERA installation or something except that this discussion seems to indicate it's a new issue that others are seeing too:

https://forums.garmin.com/developer/connect-iq/f/discussion/268211/era-invalid-key-for-the-app/1290459#1290459

In my case, it's the app "Big Weather" that has this issue, while all my others I've tried don't have the problem.