Got this error when attempting to update Sonnarr installed on my FreeNas as a Jail to the latest version:

Error occurred while executing task ApplicationUpdate: ApplicationName='mono', CommandLine='--debug /tmp/nzbdrone_update/NzbDrone.Update.exe 88519 /tmp/nzbdrone_update /usr/pbi/sonarr-amd64/share/sonarr/NzbDrone.exe /data=/var/db/sonarr /nobrowser', CurrentDirectory='', Native error= Cannot find the specified file

How to Fix and Update Sonarr

1. Log onto FreeNas Gui
2. Click Plugins
3. Click Sonarr Jail
4. Open Shell Terminal
5. pkg install mono # install mono package say yes to install
6. Go back to Sonarr GUI
7. Click System –> Updates
8. Click Install next to latest version
9. Done