Hi! I understand you're seeing a plain black screen in the HUD app, but when you click the center, you can still see people's photos. I'd like to get a better sense of the issue to help you fix it.

Could you tell me:
- When did this start happening?
- Does it happen all the time or only at certain moments?
- Have you tried closing and reopening the app?
- Is the app fully updated to the latest version?
- Have you checked if your Android OS (version 10) has any pending updates?
- Lastly, are you connected to Wi-Fi or mobile data at the time you see this?

Knowing these will help pinpoint the cause. Meanwhile, here are some initial steps you can try:

1. Restart the App: Close the HUD app completely from recent apps and restart it. Sometimes this clears temporary glitches.
2. Clear Cache: On Android 10, go to Settings > Apps > HUD app > Storage, then tap Clear Cache. This removes temporary files without deleting your data.
3. Check Permissions: Ensure the app has permission to access storage and display over other apps if needed, as limited permissions can cause display issues.
4. Restart Your Phone: A full reboot can resolve graphical glitches related to the OS or graphics drivers.
5. Reinstall the App: If the problem persists, uninstall and reinstall HUD from the app store. This often fixes corrupted app files that cause black screens.

If after trying these the screen is still black except for photos when clicking, let me know. I can then guide you deeper, like checking app logs or verifying if there is a known issue with HUD app on your device model.

Are you comfortable trying these steps now? If so, which ones have you already attempted? That way, I won't suggest repeats.