I am trying to get wireguard working on Manjaro Phosh pinephone which has kernel 5.7. Anyone know what this error seen when adding the wg0 interface with wg-quick means? Is there some feature missing from the pinephone kernel?

[#] ip -6 rule add not fwmark 51820 table 51820
RTNETLINK answers: Operation not supported

Full details: https://tilde.team/~supernova/blog/trying-wireguard-on-manjaro-phosh.html