Hi! I see you're getting an "Error Processing Request" message when using ZipGrade. I’d like to help you get this sorted out. To start, can you tell me when exactly this error pops up? For example:

- Is it when you try to upload or scan an answer sheet?
- Does it happen every time or just occasionally?
- Are you connected to the internet when this occurs?
- Have you tried restarting the app or your device?

Knowing a bit more will help me guide you better.

Meanwhile, here are some general steps to try for this error:

1. Check Your Internet Connection: Make sure you have a stable connection as the app needs to communicate with the ZipGrade servers.
2. Restart the App: Close and reopen ZipGrade to refresh the connection.
3. Update the App: Ensure you have the latest version installed in case this is a known bug they've fixed.
4. Clear Cache or Temporary Data: Sometimes stored data can cause issues; although the app might not have a direct cache clear option on Windows browsers, restarting the browser or clearing its cache may help.
5. Try a Different Browser: Since you're using WebKit on Windows, it might be worth trying another browser (like Chrome or Firefox) to see if the issue persists.

If these don’t help, please let me know more about exactly when the error appears, and I can guide you further or suggest more advanced troubleshooting steps.