I've been working on with React for a while, successfully using npm start to view how my application is running.

At some point, my app stopped loading at http://localhost:3000/.

I get this in the terminal:

Compiled successfully!

You can now view contact-list in the browser.

  Local:            http://localhost:3000
  On Your Network:  http://192.168.1.16:3000

Note that the development build is not optimized.
To create a production build, use npm run build.

In my Chrome browser, it looks like it's just perpetually loading, showing no errors. Nothing is showing up in the console.

I tried deleting the browser cache.

I tried checking http://192.168.1.16:3000. It also just perpetually loaded.

I tried another project on the same port and it worked, so it doesn't seem like an issue with the port.

Here is my package.json:

{
  "name": "contact-list",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.11.10",
    "@testing-library/react": "^11.2.6",
    "@testing-library/user-event": "^12.8.3",
    "bootstrap": "^5.1.3",
    "react": "^18.1.0",
    "react-dom": "^17.0.2",
    "react-router-dom": "^6.3.0",
    "react-scripts": "4.0.3",
    "web-vitals": "^1.1.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

Does anyone know what could be going wrong?