Wireguard profile - /dev/fd/63 - No such file or directory

Hi,

I'm trying to set-up this:
https://github.com/ViRb3/wgcf#generate-wireguard-profile

But it results in this:

[#] ip link add wgcf-profile type wireguard
[#] wg setconf wgcf-profile /dev/fd/63
[#] ip -4 address add 172.16.0.2/32 dev wgcf-profile
[#] ip -6 address add fd01:5ca1:ab1e:8953:5e8f:a0a0:4ba3:8135/128 dev wgcf-profile
[#] ip link set mtu 1280 up dev wgcf-profile
[#] wg set wgcf-profile fwmark 51820
[#] ip -6 route add ::/0 dev wgcf-profile table 51820
[#] ip -6 rule add not fwmark 51820 table 51820
[#] ip -6 rule add table main suppress_prefixlength 0
[#] nft -f /dev/fd/63
/dev/fd/63:2:1-90: Error: Could not process rule: Operation not supported

/dev/fd/63:3:1-93: Error: Could not process rule: Operation not supported

/dev/fd/63:4:1-95: Error: Could not process rule: Operation not supported

/dev/fd/63:5:1-147: Error: Could not process rule: No such file or directory

/dev/fd/63:6:1-92: Error: Could not process rule: No such file or directory

/dev/fd/63:7:1-85: Error: Could not process rule: No such file or directory

[#] ip -6 rule delete table 51820
[#] ip -6 rule delete table main suppress_prefixlength 0
[#] ip link delete dev wgcf-profile

Any ideas what am I doing wrong ?