Replit: “Your app is not responding / webview can't connect”

What it means

The server listens on localhost or the wrong port, so Replit can't route traffic to it.

How to fix it

Listen on 0.0.0.0 and process.env.PORT; check the .replit run command.

Paste this into Replit

Stop retrying previous fixes. I'm getting this error: "Your app is not responding / webview can't connect". Likely cause: The server listens on localhost or the wrong port, so Replit can't route traffic to it. Before editing, show me the relevant files and confirm the root cause. Then: Listen on 0.0.0.0 and process.env.PORT; check the .replit run command. Change only what's necessary, don't delete working code, don't add new libraries unless required, and tell me exactly what you changed and how to verify it.