I always run into issues installing Jellyfin on TrueNAS core. I fix them, and then I forget a few months later, so these are just my notes to myself of how to install Jellyfin on TrueNAS core. Instructions Install based on these instructions: https://github.com/Thefrank/jellyfin-server-freebsd/blob/main/Installation_TrueNAS_GUI.md#the-advanced-way We need to follow the advanced instructions because TrueNAS plugins are deprecated. Gotcha: Jellyfin server is not available The first few loads after installing, an error will appear saying Jellyfin isn’t available.