Hi there! I understand you're encountering an error code in the Knott's Berry Farm app related to making payment after logging in. I’d like to help you get this sorted out. Could you share the exact error code or message you received? Also, did the issue occur right after entering login credentials or later during the payment process?

In the meantime, here are some initial steps we can try to resolve payment app errors:

1. Check Purchase Limits: Knott's Berry Farm sometimes has limits on how many tickets or passes can be purchased at once. If your cart exceeds this, it can trigger an error. Try reducing your ticket quantity to see if that helps.

2. Clear Cache and Cookies: Since you're using Windows with a WebKit browser, clearing your browser's cache and cookies can fix many issues related to app functionality.

3. Verify Payment Method: Make sure your payment card details are entered correctly. Sometimes certain cards are flagged or declined due to security reasons. If possible, try using a different card.

4. Update the App or Browser: Ensure your app is updated to the latest version, or if using the web app, that your browser is up to date.

5. Restart and Retry: Sometimes a simple restart of the browser or app, and then logging in again, can clear transient errors.

If these don’t solve the issue, please let me know the exact error code or message you see, and if you can, tell me more about your purchase (like how many tickets you’re trying to buy). That way, I can give you a more targeted solution.

Also, if this is a persistent problem, Knott's Berry Farm’s official contact page is available for direct support: https://www.knotts.com/contact-us 2.

Let me know how it goes! Are you able to try these steps?