fe.settings:getUserBoardSettings - non array given[os] - Endchan Magrathea
I am now also aware of the existence of a potential heir to Tails called Kodachi. It might be worth trying out, but I haven't tried it out yet so I can only recommend people to try it out, not recommending people to use it all the time.

https://www.digi77.com/linux-kodachi/