Hi! I understand that the Live tab is not showing any live classes and the Upcoming tab is also empty in your Next Toppers app. Let's work together to get this sorted out.

To start off, could you please let me know:

1. Have you recently updated the app to the latest version?
2. Are you signed in with the correct account that's enrolled in the courses?
3. Have you checked your internet connection to ensure it's stable?
4. Is this issue happening on the desktop app or through a web browser on your Windows 10 device?

Meanwhile, here are some initial steps you can try:

1. Restart the app: Close the app completely and reopen it.
2. Check Enrollment: Go to the “My Courses” or “Student Workspace” section and verify if your courses are properly listed.
3. Clear Cache: If using a browser, clear browser cache or if on an app, clear app cache in the settings.
4. Update the app: Make sure the app is updated to the latest version available.

If all these are checked and you're still facing the issue, it might be related to a temporary technical glitch on their end or an app bug.

There are reports recently where users experienced similar issues like “Oops! No data found” for live classes, which sometimes relates to server or data sync errors3. One useful YouTube tutorial suggests checking enrollment and course access first before moving to more complex fixes5.

If you confirm you've done these or if you want, I can guide you through some advanced steps like reinstalling the app or checking your account status on the official Next Toppers platform.

Could you please share what you've tried so far? That’ll help me assist you better!