So I've installed this driver on my environment and follow guide and it works without any issue. I choose OAuth2 as an authentication option. Maybe you missed some step in configuration?
Edit: Don't be offended that I'm asking, but didn't you copy the http endpoint from the documentation in the section below? I've seen a lot of people who used the example address from the documentation instead of their endpoint.
Also, if you use OAuth2 authentication make sure that you didn't omit below step: