Getting 'Failed to import the required Python library Docker SDK'

```
TASK [Build the x86 Docker image from the main Dockerfile.] ********************
fatal: [localhost]: FAILED! => {"changed": false, "msg": "Failed to import the required Python library (Docker SDK for Python: docker (Python >= 2.7) or docker-py (Python 2.6)) on fv-az190-719's Python /opt/hostedtoolcache/Python/3.9.5/x64/bin/python. Please read the module documentation and install it in the appropriate location. If the required library is installed, but Ansible is using the wrong Python interpreter, please consult the documentation on ansible_python_interpreter, for example via `pip install docker` or `pip install docker-py` (Python 2.6). The error was: No module named 'six'"}
```

Lots of failed builds with the above. Not sure why, I do the install on the Actions CI environment with `pip3 install ansible docker` :/