WebSocket connection to 'wss://example.com/dashboard/chat/' failed: WebSocket is closed before the connection is established

 CHANNEL_LAYERS = {
    "default": {
        # This example app uses the Redis channel layer implementation asgi_redis
        "BACKEND": "asgi_redis.RedisChannelLayer",
        'CONFIG': {
            "hosts": [os.environ.get('REDIS_URL', 'redis://localhost:6379')],
        }
        "ROUTING": "stp.routing.channel_routing",  # We will create it in a moment
    },
}

 from channels import include
channel_routing = [
    include('multichat.routing.chat_routing', path=r"^/dashboard/chat/"),
]

 from channels.routing import route
from multichat.consumers import *
chat_routing = [
    route("websocket.connect", chat_connect),
    route("websocket.receive", chat_receive),
    route("websocket.disconnect", chat_disconnect)
]

 @channel_session_user_from_http
def chat_connect(message):
    logger.info('websocket_connect. message = %s', message)
    Group("all").add(message.reply_channel)
    Room.objects.add("all", message.reply_channel.name, message.user)
    message.reply_channel.send({"accept": True})

 location /dashboard/chat/ {
            proxy_pass http://0.0.0.0:8001;
            proxy_http_version 1.1;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Host $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
    }

 ./manage.py runworker --traceback
2018-03-06 18:28:10,456 - INFO - runworker - Using single-threaded worker.
2018-03-06 18:28:10,456 - INFO - runworker - Running worker against channel layer default (asgi_redis.core.RedisChannelLayer)
2018-03-06 18:28:10,457 - INFO - worker - Listening on channels http.request, websocket.connect, websocket.disconnect, websocket.receive

 daphne -b 0.0.0.0 -p 8001 stp.asgi:channel_layer
2018-03-06 18:29:57,498 INFO     Starting server at tcp:port=8001:interface=0.0.0.0, channel layer stp.asgi:channel_layer.
2018-03-06 18:29:57,499 INFO     HTTP/2 support not enabled (install the http2 and tls Twisted extras)
2018-03-06 18:29:57,499 INFO     Using busy-loop synchronous mode on channel layer
2018-03-06 18:29:57,499 INFO     Listening on endpoint tcp:port=8001:interface=0.0.0.0
127.0.0.1:55384 - - [06/Mar/2018:18:30:23] "WSCONNECTING /dashboard/chat/" - -
127.0.0.1:55384 - - [06/Mar/2018:18:30:25] "WSDISCONNECT /dashboard/chat/" - -
127.0.0.1:55478 - - [06/Mar/2018:18:30:55] "WSCONNECTING /dashboard/chat/" - -
127.0.0.1:55478 - - [06/Mar/2018:18:30:57] "WSDISCONNECT /dashboard/chat/" - -
127.0.0.1:56066 - - [06/Mar/2018:18:31:27] "WSCONNECTING /dashboard/chat/" - -
127.0.0.1:56066 - - [06/Mar/2018:18:31:29] "WSDISCONNECT /dashboard/chat/" - -