Hi there! I understand you're having trouble logging into the Marriott Vacation Club app, and once logged in, you can’t book points or view properties. I’d like to help you get this resolved.

To start, can you tell me if you’re using the app or the website through your WebKit browser on your Windows 10 device? Also, do you get any specific error messages when trying to log in or when attempting to book or view properties?

Meanwhile, here’s a general step-by-step approach we can try together:

1. Clear the browser cache and cookies on your WebKit browser to ensure there's no corrupt data affecting your session.
2. Make sure your app or browser is updated to the latest version. If you’re accessing via the app, uninstall and reinstall it to fix any corrupted files.
3. Log out completely and then log back in. Sometimes refreshing your session helps.
4. Check your internet connection to ensure it’s stable.
5. Try accessing the site or app from a different device or browser to see if the problem persists.
6. If you use any VPN or proxy service, disable it temporarily as this can sometimes cause issues with logging in or booking.
7. Confirm your account credentials are correct and that your membership is in good standing.

There have been reports recently of intermittent issues with Marriott’s reservation system and app functionality that are affecting multiple users as of October 2023. This may be a server-side issue causing difficulties with bookings or viewing properties. So, even after trying these fixes, if problems continue, it might be worth raising the issue directly with Marriott’s technical team.

If you want, I can guide you on how to contact Marriott Mobile Customer Care, or you can try emailing [email protected] for specialized help with the app.

Let me know what you find or if you want to try these steps together!