[Answered ]-Django Channels : WebSocket connection failed

Channels 4.0.0 does not start the ASGI server by default. So, Try adding ‘daphne’ to your INSTALLED_APPS in settings.py.

First pip

pip install -U 'channels[dapne]' channels-redis

Then in your Django settings file:

 INSTALLED_APPS = [
    "daphne",
    ...
]

See the Channels 4.0.0 release notes for more info: https://channels.readthedocs.io/en/stable/releases/4.0.0.html?highlight=INSTALLED_APPS#release-notes

Alternative Solution

Lowering the version of the channel to 3.0.5 seemed to work.

Try

pip uninstall channels
pip install channels==3.0.5