• Package Name: cosmos, Sphinx
• Package Version: V4
• Operating System: Ubuntu
• Python Version: 3.8.5

Describe the bug
I can see doc folder in the repository. I tried to use Sphinx-build tool to generate the doc containing cosmos APIs, but got errors and see the content is blank for cosmos APIs.

To Reproduce
That's the steps I followed:

1. cd doc/sphinx
2. sphinx-apidoc -f -e -o ref ../../sdk/cosmos/
3. make html

Expected behavior
Doc generated with cosmos APIs.

Screenshots
Got errors during make html:

Also going into the static index.html page, found azure.cosmos API is empty:

Additional context
We would like to know:

1. If the steps are correct to generate API docs?
2. By reading errors, it seems some contents are missing from the ref folder. How should I avoid these and see actual content in the generated html page?