nodemon crashed 🟩 Node.js

[nodemon] app crashed - waiting for file changes before starting...

Your app threw an error on startup; nodemon is waiting for a file change to retry.

Seen on: Node.js

Meaning

The message is only nodemon’s status — the real error is printed just above it.

Common causes

  • Startup exception (syntax error, missing module)
  • Port already in use
  • Missing environment variable or config file

⚡ Quick fix

  1. Scroll up to the first error above this line
  2. Fix it and save a file to restart
  3. Run node directly to see output without nodemon

Detailed fix by platform

Node.js

  1. node --trace-uncaught src/index.js

How to diagnose

  1. Error above — What was printed before the crash line?
  2. Recent change — Did it start after a deploy, upgrade, or configuration change? Compare with the last working version.

🧠 Still stuck? Analyze your error

Paste the full message, response headers or stack trace — we'll detect the platform and point to the most likely cause.