Troubleshooting
Fix common issues with codes, loading, and browser problems.
Browser Cache and Troubleshooting
Clear cache and cookies, disable extensions, and try a different browser when Duel.com has loading or display issues.
Why Your Promo Code Says Invalid or Isn't Applying
Troubleshooting when a Duel.com promo code shows as invalid or fails to apply. Common causes and fixes.
Mobile vs Desktop: UI Differences and Tips
How Duel.com differs on mobile and desktop, and tips for using each platform.