Websocket not working with django on deployment - django

Question

i hope that u can help me.
I deployed my django application to an ubuntu 20.04 server with nginx and gunicorn.
This is my settings:
gunicorn.service
[Unit]
Description=gunicorn daemon
Requires=gunicorn.socket
After=network.target
[Service]
User=ubuntu
Group=www-data
WorkingDirectory=/var/www/PlugSell
ExecStart=/var/www/PlugSell/env/bin/gunicorn --access-logfile - --error-logfile - -k uvicorn.workers.UvicornWorker --workers 3 --bind unix:/run/gunicorn.sock minible.asgi:application
[Install]
WantedBy=multi-user.target
app nginx conf
server {
server_name 3.73.206.145 127.0.0.1 sell.plug-shop.com;
location = /favicon.ico {
access_log off; log_not_found off;
}
location /static/ {
root /var/www/PlugSell;
}
location / {
include proxy_params;
proxy_pass http://unix:/run/gunicorn.sock;
}
location /ws/ {
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Url-Scheme $scheme;
proxy_redirect off;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_pass http://unix:/run/gunicorn.sock;
}
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/sell.plug-shop.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/sell.plug-shop.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
if ($host = sell.plug-shop.com) {
return 301 https://$host$request_uri;
} # managed by Certbot
listen 80;
server_name 3.73.206.145 127.0.0.1 sell.plug-shop.com;
return 404; # managed by Certbot
}
in settings.py i have
CHANNEL_LAYERS = {
"default": {
"BACKEND": "channels_redis.core.RedisChannelLayer",
"CONFIG": {
"hosts": [("127.0.0.1", 6379)],
},
},
}
and in my asgi.py
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'minible.settings')
django.setup()
application = ProtocolTypeRouter({
"http": get_asgi_application(),
"websocket": AuthMiddlewareStack(
URLRouter(
[
path('ws/notification/',
consumer.NotificationConsumer.as_asgi())
]
)
)
})
Redis is installed and work perfectly (binding at 0.0.0.0)
Everything works perfectly but the websocket doesn't work.
I try to connect to the websocket via "wss://sell.plug-shop.com/ws/notification/" but the connection always fails. In the nginx log file it does not give me any information regarding some connection error to the websocket