Openstack loadbalancer list issue

Hi,
since the load balance inside the web interface is not working; I was trying to use the command line interface but I have a problem.

The command “openstack image list” is ok, but the command “openstack loadbalancer list” rises a problem:

[mex@lab00 bigData]$ openstack loadbalancer list
openstack: 'loadbalancer list' is not an openstack command. See 'openstack --help'.
Did you mean one of these?
  container create
  container delete
  container list
  container save
  container set
  container show
  container unset

Maybe the loadbalance module is not installed in OpenStack side?

The doc says that is should be possible:
https://docs.openstack.org/python-octaviaclient/pike/usage/osc/v2/load-balancer.html

Thanks in advance,
Massimo