Fix routing according to the changelog

api/config/routing.py

@@ -8,7 +8,7 @@ application = ProtocolTypeRouter(
     {
         # Empty for now (http->django views is added by default)
         "websocket": AuthMiddlewareStack(
-            URLRouter([url("^api/v1/activity$", consumers.InstanceActivityConsumer)])
+            URLRouter([url("^api/v1/activity$", consumers.InstanceActivityConsumer.as_asgi())])
         )
     }
 )