Hi all, I have deployed OpenStack on my system (all with Ubuntu 20.04 Desktop versions) using kolla-ansible deployment. I am able to launch containers and open the terminal (console of containers) in the web-browser from the horizon dashboard. However, when I installed an OpenStack on my system using *Ubuntu 20.04 Server* version using kolla-ansible deployment, all containers were running, but I was not able to access the terminal in the web-browser on the horizon dashboard for the running container. I am getting an error message "*Firefox can't establish a connection to the server at wss://...*" All my OpenStack is deployed using the Python virtual environment. I have been following the exact steps in deploying OpenStack from "https://docs.openstack.org/kolla-ansible/yoga/user/quickstart.html." My current OpenStack version is yoga. Apart from that, I would like to ask if there is any specific path I can make modifications on my OpenStack. Every time when I deployed a fresh OpenStack on my system and tried to make some modifications, the path might not take any effect on the horizon dashboard. Sometimes, modifying the library in /var/lib/kolla/venv/lib/python3.8/site-packages/openstack_dashboard and restarting horizon updates the modification. Sometimes, it might be in /horizon-source/.../openstack_dashboard/. Thank you, Vincent