Openstack stein TLS configuration with combined method of interfaces

Hello, Openstack version: stein Deployment method: kolla-ansible I am trying to set up TLS for Openstack endpoint. I have chosen combined method of vip address where I supply only kolla_internal_vip_address and network_interface details. I do not enable external kolla vip address. After this I set up kolla_enable_tls_external: 'yes' and pass the kolla_external_fqdn_cert certificates. The installation is successful but I see that http link opens but https:// endpoint does not open at all. Is as good as not available. Any reason for this? Regards, Roshan