Failed to reload Nginx. Please make sure to start the exchange API server first

I’m not able to complete my setup, anyone please help
docker-compose detected
version: docker-compose version 1.25.0, build unknown
docker-py version: 4.1.0
CPython version: 3.8.10
OpenSSL version: OpenSSL 1.1.1f 31 Mar 2020


Generating web docker-compose file
Updating main Nginx.conf based on user settings…
WARNING: Some services (demotest-web) use the ‘deploy’ key, which will be ignored. Compose does not support ‘deploy’ configuration - use docker stack deploy to deploy to a swarm.
Starting demotest-web … done
Reloading Nginx…
nginx: [emerg] host not found in upstream “demotest-server-stream:10080” in /etc/nginx/conf.d/upstream.conf:6
Failed to reload Nginx. Please make sure to start the exchange API server first.
The web server could be still reachable through ‘http://localhost:8080’,
But the allocated domain for the web would not function correctly.

Hi, are you still having problems?

Yes!
can you check what’s the issue