Comment 4 for bug 1721736

What version are you using now? Looking at the ocata code, here's the code for the add user action: https://github.com/openstack/horizon/blob/stable/ocata/openstack_dashboard/dashboards/identity/users/tables.py#L27. Please check if the policy rules and the OPENSTACK_KEYSTONE_BACKEND setting on local_settings.py are set properly.