Thought I'd share a fix for an issue that I solved so that hopefully it helps someone else.
I tinkered with my Plex app on my Android phone before upgrading to Plex Pass, so every time I would enter the menu on my phone for syncing photos, I would get an error stating that the phone could not connect to the server, even when entering the photo upload screen. I uninstalled the Plex app and reinstalled it, Signed in, and the walk through process for photo upload re-appeared and started syncing.
A little annoying, but it works.
If the app developers read this, can you modify the "Server cannot connect" warning so it does not prevent me from modifying settings in the camera upload setting screen?