“[nodemon] app crashed – waiting for file changes” – I’m completely stumped

This is actually part of a training exercise, but I’m sure I’ll need it for a Capstone project I’m working on. I’ve tried a couple of things, but a lot of what I looked up is confusing to me. Does anyone know of a simple way to fix this?…

My index.js code.

I’ve tried killing the server elsewhere and checking if I installed Express erroneously. I double-checked to make sure my files were saved and in proper syntax. Nothing changed. Some of the solutions I looked up were hard to follow, and I didn’t want to risk messing up my files using the wrong thing.

The error in question is “listen EADDRINUSE: address already in use ::: 5000.”