# Create IP address
set interfaces ethernet eth0 address '192.168.0.50/24

## VRRP config:
set high-availability vrrp group FOO interface 'eth0'
set high-availability vrrp group FOO virtual-address '192.168.0.254/24'
set high-availability vrrp group FOO vrid '10'
set high-availability vrrp sync-group SG member 'FOO'

# conntrack-sync config:
set service conntrack-sync failover-mechanism vrrp sync-group 'SG'
set service conntrack-sync interface eth0

vyos@vyos# set service conntrack-sync listen-address 192.168.0.50
[edit]
vyos@vyos# commit
[ service conntrack-sync ]
VyOS had an issue completing a command.

We are sorry that you encountered a problem while using VyOS.
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Report time:      2022-02-11 11:25:48
Image version:    VyOS 1.3.0
Release train:    equuleus

Built by:         Sentrium S.L.
Built on:         Sun 19 Dec 2021 12:59 UTC
Build UUID:       ff458f8a-3ef7-453c-a7f9-4aeb6d03012e
Build commit ID:  2f691bb2f61e96-dirty

Architecture:     x86_64
Boot via:         installed image
System type:      KVM guest

Hardware vendor:  Bochs
Hardware model:   Bochs
Hardware S/N:     
Hardware UUID:    8db60a0f-442b-4234-8577-03b8cd2b0f98

Traceback (most recent call last):
  File "/usr/libexec/vyos/conf_mode/conntrack_sync.py", line 130, in <module>
    verify(c)
  File "/usr/libexec/vyos/conf_mode/conntrack_sync.py", line 86, in verify
    if not is_addr_assigned(address):
  File "/usr/lib/python3/dist-packages/vyos/validate.py", line 108, in is_addr_assigned
    tmp = is_intf_addr_assigned(intf, addr)
  File "/usr/lib/python3/dist-packages/vyos/validate.py", line 50, in is_intf_addr_assigned
    return _is_intf_addr_assigned(intf, addr)
  File "/usr/lib/python3/dist-packages/vyos/validate.py", line 84, in _is_intf_addr_assigned
    if not _are_same_ip(address, ip_addr):
  File "/usr/lib/python3/dist-packages/vyos/validate.py", line 44, in _are_same_ip
    return inet_pton(f_one, one) == inet_pton(f_one, two)
TypeError: inet_pton() argument 2 must be str, not list