root@U-NAS-HansWork:~# sudo wget -O- https://repo.jellyfin.org/jellyfin_team.gpg.key | sudo apt-key add -
--2022-02-18 11:31:49-- https://repo.jellyfin.org/jellyfin_team.gpg.key
Resolving repo.jellyfin.org (repo.jellyfin.org)... 68.183.204.194, 2604:a880:cad:d0::cf3:f001
Connecting to repo.jellyfin.org (repo.jellyfin.org)|68.183.204.194|:443... connected.
ERROR: The certificate of ‘repo.jellyfin.org’ is not trusted.
ERROR: The certificate of ‘repo.jellyfin.org’ has expired.
gpg: no valid OpenPGP data found.