Hi! I see you're having trouble opening the Jackpot Party app on your Windows 10 device using WebKit browser. Let's try to get this sorted out for you.

First, could you tell me if you are trying to open Jackpot Party via a browser or a desktop app? Also, have you noticed any error messages or does it just not respond? This will help me narrow down the best steps for you.

In the meantime, here are some general steps you can try if you are using a browser:

1. Refresh the webpage and try reopening the game.
2. Close your WebKit browser completely and reopen it, then navigate to Jackpot Party again.
3. Clear your browser cache and cookies, as stored files can sometimes cause issues loading web apps.
4. Make sure your internet connection is stable and reasonably fast.
5. Check if there are any Windows updates pending and install them, then restart your PC.
6. Try using a different browser to see if the issue is specific to WebKit.

If you are using a desktop app for Jackpot Party and it won’t open:

1. Try closing any running instance of the app via Task Manager (Ctrl+Shift+Esc), then restart the app.
2. Restart your computer and try launching the app again.
3. Confirm that the app is updated to the latest version.
4. If possible, uninstall and reinstall the app to refresh any corrupted files.

Let me know which approach fits your setup and if any of these help. If not, I can guide you with some more detailed troubleshooting based on what you tell me!