MissingSchema: Invalid URL '10.128.15.193/stable/connect': No scheme supplied

[sentry]

Observed behavior

The following error was observed attempting to load recommendations on Studio's unstable server.

Sentry Issue: STUDIO-HS7

MissingSchema: Invalid URL '10.128.15.193/stable/connect': No scheme supplied. Perhaps you meant https://10.128.15.193/stable/connect?
(1 additional frame(s) were not displayed)
...
  File "automation/utils/appnexus/base.py", line 112, in _make_request
    response = self.session.request(
  File "automation/utils/appnexus/base.py", line 30, in request
    return super().request(*args, **kwargs)

Invalid URL '10.128.15.193/stable/connect': No scheme supplied. Perhaps you meant https://10.128.15.193/stable/connect?

Expected behavior

We should ensure that the recommendations API URL is properly formatted with a scheme, which should be http for this API only available within the local network.