I use emby in Truenas and tried to run an upgrade through the Truenas Plugin manager. After doing this upgrade the web portal for Emby would not come up. I tried to roll back snapshots with no luck. So I deleted the plugin and installed a fresh instance of Emby through the plugin manager. I had nightly backups running through the emby backup manager to a file location outside of the jail. After the install I recreated the folder location for my media mount (/mnt/Media), then stopped the plug