ImportError: Failed to initialize: Bad git executable.

[sentry-io]

Sentry Issue: RASA-OPEN-SOURCE-180

ImportError: Bad git executable.
The git executable must be specified in one of the following ways:
    - be included in your $PATH
    - be set via $GIT_PYTHON_GIT_EXECUTABLE
    - explicitly set via git.refresh()

All git commands will error until this is rectified.

This initial warning can be silenced or aggravated in the future by setting the
$GIT_PYTHON_REFRESH environment variable. Use one of the following values:
    - quiet|q|silence|s|none|n|0: for no warning or exception
    - warn|w|warning|1: for a print...
  File "__init__.py", line 83, in <module>
    refresh()
  File "__init__.py", line 73, in refresh
    if not Git.refresh(path=path):
  File "site-packages/git/cmd.py", line 278, in refresh
    raise ImportError(err)

ImportError: Failed to initialize: Bad git executable.
The git executable must be specified in one of the following ways:
    - be included in your $PATH
    - be set via $GIT_PYTHON_GIT_EXECUTABLE
    - explicitly set via git.refresh()

All git commands will error until this is rectified.

This initial warning can be silenced or aggravated in the future by setting the
$GIT_PYTHON_REFRESH environment variable. Use one of the following values:
    - quiet|q|silence|s|none|n|0: for no warning or exception
    - warn|w|...
(3 additional frame(s) were not displayed)
...
  File "rasa/__main__.py", line 115, in main
    cmdline_arguments.func(cmdline_arguments)
  File "rasa/cli/x.py", line 339, in rasa_x
    run_locally(args)
  File "rasa/cli/x.py", line 428, in run_locally
    from rasax.community import local  # pytype: disable=import-error