my PLEX server (using latest version) is installed on my win 10 64bit PC.
I also have a smart android tv, both of them (tv & plex) are on the same LAN.
When i turn on a VPN connection on my PC, I lose all connection from my LAN devices to PLEX.
I need to sign out from each app and log back in again using the code the appears on the screen.
That’s only logical, as you are removing your computer from the LAN by activating the VPN.
You might wanna take a look at this: [How To] Bypass VPN for Plex