ASGIRef 3.4.0 deadlock_context causes exception on threading

[herpolody]

I still can see this issue. I am a noob in channels, just following the tutorials. Today installed channels.
Python 3.8, Django 2.2.6, channels 3.0.4, asgiref 3.4.1

• Tutorial introduction -> no issues, channels is taking care of the http requests

• Tutorial 1: Basic setup -> Ok

• Tutorial 2 : after adding the websocket protocol to asgi.py some static files not loading (some loading others not), error 500 in the server, deadlock error in the Traceback, same symptoms as ASGIRef 3.4.0 deadlock_context causes exception on threading #275

  As per rdmrocha, falling back to the asgiref version 3.3.4 problem is gone, static files loading without errors.

[carltongibson]

This is a duplicate of django/channels#1722 @herpolody if you'd like to follow there.