ip6tables-restore: command not found

[konsumer]

I get this error using ghcr.io/vidurb/transmission-wireguard:latest:

transmission-1  | [#] ip6tables-restore -n
transmission-1  | /usr/bin/wg-quick: line 32: ip6tables-restore: command not found
transmission-1  | [#] resolvconf -d wg0 -f
transmission-1  | [#] ip -6 rule delete table 51820
transmission-1  | [#] ip -6 rule delete table main suppress_prefixlength 0
transmission-1  | [#] ip link delete dev wg0
transmission-1  |
transmission-1  |       wg-quick was unable to create the interface.
transmission-1  |       Please see the logs above
transmission-1  |
transmission-1  | [cont-init.d] 20-start-wireguard: exited 1.