Facebook authentication errors are frustrating, but they're usually fixable! Here's how to diagnose and resolve the most common causes.

What causes authentication errors: 

Credential mismatch - An "Authentication Failed" error occurs with Facebook login when the credentials of your game account and the credentials of your Facebook account don't match

Common causes: 

Multiple Facebook accounts - Being logged in to multiple Facebook accounts
Account type changes - Updating your Facebook to a professional/monetized/creator account
Email changes - Recently changed your Facebook email
Wrong login method - Previously logged into the game using Google login instead

Step-by-step solutions:

If you recently changed your Facebook email:

  1. Open the Facebook settings
  2. Revert to your previous Facebook account email
  3. Log in to Atlas Earth

If you updated to a professional/creator account:

  1. Open the Facebook settings
  2. Revert to your previous Facebook account status
  3. Log in to Atlas Earth

If you've been using multiple Facebook accounts:

  1. Log out of the game (you may need to uninstall and reinstall the app to force a log out)
  2. Sign out of all instances of Facebook in your browser
  3. Uninstall the Facebook app if you have it installed
  4. Clear your cache and browser history
  5. Log back in using the correct Facebook account

If you originally used Google login:

  1. Click the "Other Options" button at the bottom of the login screen
  2. Select the Google login option
  3. Log in using your Google login

Additional troubleshooting:

Quick fixes to try first: 

Restart the app - Force close and reopen Atlas Earth
Update Facebook app - Ensure you're using the latest version
Check internet connection - Verify you have stable connectivity
Verify Facebook login - Make sure you can log into Facebook normally

Prevention tips: 

Stick to one login method - Don't switch between Facebook and Google
Avoid email changes - Keep your Facebook email consistent
Single Facebook account - Use the same Facebook account consistently
Account type stability - Avoid frequent Facebook account type changes

Still having trouble: If the issue persists, please speak with a customer support agent for additional assistance. They can check your specific account situation and provide personalized help.

Pro tip: Write down which login method you used originally (Facebook or Google) to avoid authentication conflicts in the future! Most login issues come from accidentally mixing different authentication methods.