For weeks now, Camera uploads has a message at the top:
Camera uploads (1 left)
Couldn't upload photo. Tap for more info.
Tapping just gives me the generic help page, which is oriented toward complete failures to upload. That's NOT my problem, because all my other photos have been and continue to upload just fine.
How can I figure out what the problem file is so I can delete it or rename it or tell Dropbox not to bother with that folder, or whatever the fix turns out to be? Telling me there's a problem isn't much help without a hint of what the problem is.
Android 9 (Pixel 2 XL) and fully updated as of 10 minutes ago.