The Docker Engine you're using is running in swarm mode. Compose does not use swarm mode to deploy services to multiple nodes in a swarm. All containers will be scheduled on the current node.

[nikoo56]

My application was working fine but suddenly I start to get this message:

The Docker Engine you're using is running in swarm mode.
Compose does not use swarm mode to deploy services to multiple nodes in a swarm. All containers will be scheduled on the current node.

I am not using swarm in my application but I worked with it before this app.

[shin-]

It's just a warning that will show up if you ran docker swarm init or docker swarm join. If you don't intend to use Swarm mode on this instance of the Docker engine, you may run docker swarm leave --force to get rid of the warning. Either way, this will not affect your application.

[nikoo56]

I am not even running swarm commands. I only Run the project inside Visual Studio 2017 that previously was running, but now I am getting this error.

[shin-]

Okay. It's not an error, it's a warning. You can safely ignore it. 👍