I see you have commented in this other thread - https://forum.duplicati.com/t/running-duplicati-on-startup-on-freenas-freebsd
Hopefully the user there that actually created the plugin can provide more assistance.
I see you have commented in this other thread - https://forum.duplicati.com/t/running-duplicati-on-startup-on-freenas-freebsd
Hopefully the user there that actually created the plugin can provide more assistance.