Hi!
I want to update PLEX on my Raspberry via OpemMediaVault but I get those errors :
Failed to execute command ‘export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C.UTF-8; apt-get update 2>&1’ with exit code ‘100’: Get:1 file:/var/cache/openmediavault/archives InRelease Ign:1
file:/var/cache/openmediavault/archives InRelease Get:2
file:/var/cache/openmediavault/archives Release Ign:2
file:/var/cache/openmediavault/archives Release Get:3
file:/var/cache/openmediavault/archives Packages Ign:3
file:/var/cache/openmediavault/archives Packages Get:4
file:/var/cache/openmediavault/archives Translation-en Ign:4
file:/var/cache/openmediavault/archives Translation-en Get:3
file:/var/cache/openmediavault/archives Packages Ign:3
file:/var/cache/openmediavault/archives Packages Get:4
file:/var/cache/openmediavault/archives Translation-en Ign:4
file:/var/cache/openmediavault/archives Translation-en Get:3
file:/var/cache/openmediavault/archives Packages Ign:3
file:/var/cache/openmediavault/archives Packages Get:4
file:/var/cache/openmediavault/archives Translation-en Ign:4
file:/var/cache/openmediavault/archives Translation-en Get:3
file:/var/cache/openmediavault/archives Packages Ign:3
file:/var/cache/openmediavault/archives Packages Get:4
file:/var/cache/openmediavault/archives Translation-en Ign:4
file:/var/cache/openmediavault/archives Translation-en Get:3
file:/var/cache/openmediavault/archives Packages Ign:3
file:/var/cache/openmediavault/archives Packages Get:4
file:/var/cache/openmediavault/archives Translation-en Ign:4
file:/var/cache/openmediavault/archives Translation-en Get:3
file:/var/cache/openmediavault/archives Packages Ign:3
file:/var/cache/openmediavault/archives Packages Get:4
file:/var/cache/openmediavault/archives Translation-en Ign:4
file:/var/cache/openmediavault/archives Translation-en Get:3
file:/var/cache/openmediavault/archives Packages Get:4
file:/var/cache/openmediavault/archives Translation-en Ign:4
file:/var/cache/openmediavault/archives Translation-en Hit:5
http://packages.openmediavault.org/public usul InRelease
Hit:6 http://archive.raspberrypi.org/debian buster InRelease
Hit:7 http://raspbian.raspberrypi.org/raspbian buster InRelease
Hit:8 http://httpredir.debian.org/debian buster-backports InRelease
Hit:9 https://openmediavault.github.io/packages usul InRelease Get:10
https://download.docker.com/linux/debian buster InRelease [44.4 kB] Ign:11
https://dl.bintray.com/openmediavault-plugin-developers/usul buster InRelease Get:12
https://dl.bintray.com/openmediavault-plugin-developers/usul buster Release [4363 B] Ign:13
https://downloads.plex.tv/repo/deb public InRelease Get:14
https://downloads.plex.tv/repo/deb public Release [5815 B] Get:15
https://downloads.plex.tv/repo/deb public Release.gpg [821 B] Ign:15
https://downloads.plex.tv/repo/deb public Release.gpg Reading package lists… W: GPG error:
https://downloads.plex.tv/repo/deb public Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 97203C7B3ADCA79D E: The repository ‘https://downloads.plex.tv/repo/deb public Release’ is not signed.
Could you help me with this?
Thank you very much 
