firejail RTNETLINK error

$:\ firejail --debug --net=eth1 firefox
get interface eth1 configuration
MTU of eth1 is 1500.
macvlan parent device eth1 at 192.168.1.107/24
Autoselecting /bin/bash as shell
Building quoted command line: 'firefox'
Command name #firefox#
Found firefox profile in /usr/local/etc/firejail directory
Reading profile /usr/local/etc/firejail/firefox.profile
Reading profile /usr/local/etc/firejail/firefox-common.profile
Reading profile /usr/local/etc/firejail/disable-common.inc
Reading profile /usr/local/etc/firejail/disable-devel.inc
Reading profile /usr/local/etc/firejail/disable-interpreters.inc
Reading profile /usr/local/etc/firejail/disable-programs.inc
Reading profile /usr/local/etc/firejail/whitelist-common.inc
Reading profile /usr/local/etc/firejail/whitelist-var-common.inc
DISPLAY=:0 parsed as 0
Parent pid 8726, child pid 8727
Initializing child process
sbox run: /usr/local/lib/firejail/fnet create macvlan eth0-8726 eth1 8727 (null)
Set caps filter 3000
RTNETLINK answers: Operation not supported
Error: failed to run /usr/local/lib/firejail/fnet
PID namespace installed
Mounting tmpfs on /run/firejail/mnt directory
Creating empty /run/firejail/mnt/seccomp.protocol file
Creating empty /run/firejail/mnt/seccomp.postexec file
Installing firewall
Creating empty /run/firejail/mnt/sbox_stdin file
sbox run: /usr/local/lib/firejail/fnetfilter /run/firejail/mnt/sbox_stdin (null)
Dropping all capabilities
Drop privileges: pid 2, uid 1000, gid 1000, nogroups 1
No supplementary groups
sbox run: /sbin/iptables-restore (null)
iptables-restore: line 17 failed
Error: failed to run /sbin/iptables-restore
Error: proc 8726 cannot sync with peer: unexpected EOF
Peer 8727 unexpectedly exited with status 1