Comment 5 for bug 1943526

Ah, so it failed at request preparation stage. Interesting.
Your server-side installation might be fine but there seems to be some incompatibility between SDK and client components that cause an issue. What versions of clients do you have installed? Please share the output of `pip list`.

Those Ansible-based solutions are opinionated and they deploy the whole OpenStack installation for you. Deploying a single service might need more effort on your side. Anyhow, here are the docs for the two solutions I mentioned:
https://docs.openstack.org/kolla-ansible/latest/
https://docs.openstack.org/openstack-ansible/latest/
There are also others and it is usually recommended to use one of the deployment projects rather than to try everything from scratch.