Camera upload is stuck on "waiting to upload"

@andycarver said:
I am having a similar/same issue on OS X. Where can I find the temporary upload folder to try and clear it?

I suggest you get diagnostic logs first to establish if the issue is really similar to what was seen before.
Screenshots and logging from both sides : server and iOS app and trying the upload after restarting the server having ensured debug logging is enabled. For this test please also enable verbose logging on the server.

https://support.plex.tv/hc/en-us/articles/201643703-Reporting-issues-with-Plex-Media-Server
https://support.plex.tv/hc/en-us/articles/200250417-Plex-Media-Server-Log-Files

https://support.plex.tv/hc/en-us/articles/201636593-iOS-Logs