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Rasa init breaks on Windows/Mac/Ubuntu due to `CompositionView` in Sanic.

See original GitHub issue

Just got notified from my Rasa install Cron. It seems on Monday 27th Dec 2021 all of the rasa init calls break. Here’s the traceback:

> python -m rasa init --no-prompt
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/site-packages/rasa/__main__.py", line 14, in <module>
    from rasa.cli import (
  File "/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/site-packages/rasa/cli/export.py", line 9, in <module>
    import rasa.core.utils
  File "/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/site-packages/rasa/core/utils.py", line 25, in <module>
    from sanic.views import CompositionView
ImportError: cannot import name 'CompositionView' from 'sanic.views' (/opt/hostedtoolcache/Python/3.7.12/x64/lib/python3.7/site-packages/sanic/views.py)

I can also confirm on pypi that Sanic just released a new version (v21.12.0) on the 26th.