Hi there! I'm sorry to hear you're having trouble adding a new credit card to your Dunkin' app. That can be frustrating. The error message you're seeing, "Please enter a different name," typically indicates that the name you entered on the credit card might already be registered in the system.

Let's work through this step by step:

1. Confirm Name Entry: Double-check the name you’ve entered for the new credit card. Make sure it matches the name on the card exactly, including any middle initials or suffixes.

2. Try a Different Name: If you’re sure the name is correct, sometimes the app might glitch. Try using a slightly different name, such as a nickname or abbreviation.

3. Clear Cache: Since you're using WebKit on Windows 10, clearing the cache might help. To do this:
- Open your browser settings.
- Navigate to the privacy or history section.
- Clear the browsing data, specifically the cached images and files.

4. Update the App: Ensure that your Dunkin' app is up to date. Sometimes updates fix more hidden bugs.

5. Re-install the App: If the issue persists, try uninstalling and then reinstalling the Dunkin' app.

If you’ve tried these steps and it’s still not working, it might also be beneficial to reach out to Dunkin's customer support. You can email them at [email protected] for further assistance.

Are you satisfied with the solution I provided, or do you need any more help with this?