Cannot add credentials / controller for openstack

[ehcpdeveloper]

I am using Ubuntu 20.04 on my Host.
I have a separate running Openstack installation. I can use Openstack normally, with its interface etc.
I installed juju using snap.

Now, I want to connect juju to my Openstack and use it as a Cloud backend.
I follow guideline at: https://juju.is/docs/openstack-cloud

juju add-cloud --local
After adding with this, I have;

$ juju list-clouds
Only clouds with registered credentials are shown.
There are more clouds, use --all to see them.

Clouds available on the controller:
Cloud Regions Default Type
localhost 1 localhost lxd

Clouds available on the client:
Cloud Regions Default Type Credentials Source Description
localhost 1 localhost lxd 1 built-in LXD Container Hypervisor
mystack 1 RegionOne openstack 2 local Openstack Cloud

As per guide:
juju add-credential mystack

ends with error:
No cloud "mystack" found on the controller "lxd": credentials are not uploaded.

So, I am stuck in this infinite loop:
- I need a credential to add a Controller
- I need a Controller to add a Credential
- I cannot add openstack cloud (named mystack) to "Clouds available on the controller" of command above.

Is this a bug, or something is missing in Guideline or, what I do wrong ?

Thanks.

[John A Meinel (jameinel)]

This is better asked as a support question on discourse.charmhub.io rather than as a bug request.