Database Permission Error

Your Firebase security rules are preventing access to the database. To fix this:

1. Go to the Firebase Console
2. Select your project
3. Click on "Realtime Database" in the left sidebar
4. Click on the "Rules" tab
5. Replace the existing rules with:

{
  "rules": {
    "users": {
      ".read": true,
      ".write": true
    }
  }
}

Note: These rules allow anyone to read and write to your database. For a production app, you should implement proper authentication.