Localhost:4000/ws WebSocket Connection Error

The ERR_CONNECTION_REFUSED error typically occurs when the server your application is trying to connect to is not running, is down, or is not configured correctly. I’m encountering an ERR_CONNECTION_REFUSED error when my application tries to establish a WebSocket connection. As shown in the images, it’s trying to connect to localhost:4000/ws but the connection is being refused. I started receiving this error after updating the application’s requirements. Is the server running correctly, or could there be an issue with the configuration? How can I resolve this issue? My application is working fine, but this warning keeps appearing in the browser console.