Your project is private, so I can’t take a look but I suggest looking for anything else using a port in your code. If you can make it public, or send me a join link then I can take a closer look
When remixing the app, it seems to work ok. Looking at your app functioning, it looks like the problem only occurs when it’s actively receiving data is that right?
listen EADDRINUSE: address already in use :::3000
Looking for a way to restart the process from a fresh console (I left a browser open after running npm start and came back to a disconnected session). The following does not help:
^ Seconding this – I get this sometimes on webpack/react projects which push the limits of what the containers can handle. It seems to just be a regular hiccup in the restart process and always resolves itself. Sometimes calling refresh works, sometimes it fires the same error again, but it always resolves itself after a little.