Hi @mwlee and welcome!
That is actually a display bug that I didn’t notice before, which means I may have been responsible for introducing it … Note that this is only a display issue and that the ENV variables are actually passed onto the
docker run command. I just tried to install the Plex rock-on on my dev machine the install went fine and I can access the Plex UI. As you can see below the ENV variables are passed correctly:
/opt/build/var/log/rockstor.log:[31/Mar/2019 08:55:49] DEBUG [system.osi:104] Running command: /usr/bin/docker run -d --restart=unless-stopped --name plex-linuxserver.io -v /mnt2/plex-conf:/config -v /mnt2/plex-data:/data -v /etc/localtime:/etc/localtime:ro -p 32400:32400/tcp -p 32400:32400/udp --net=host -e VERSION=latest -e PUID=1000 -e PGID=1000 linuxserver/plex
I believe I see a possible explanation as to why they are not displayed as they should be, but the rock-on install process itself should not suffer from it. I’ll try to correct that as soon as I can.
Sorry for this display issue, but try to go further with the install and see whether you encounter any additional issue.