Hi! I see you're encountering a black screen issue with the eFootball app on your Android device. Let's get to the bottom of this so you can enjoy your game again.

Can you tell me a bit more about when exactly the black screen appears? Is it during app startup, while loading a match, or at some other moment? Also, have you tried any fixes so far, like restarting the app or your device?

While I wait for your details, here’s a general step-by-step approach tailored for your Android WebKit environment (Android 10):

1. Close and Reopen the App: Sometimes, simply fully closing the app (remove it from recent apps) and restarting it clears temporary glitches.

2. Clear Cache and Data:
- Go to your device Settings > Apps & notifications > find eFootball.
- Tap Storage & cache.
- Choose Clear Cache first. If the issue persists, try Clear Storage/Data (note this may reset some settings or require login again).

3. Check for App Updates: Make sure you’re running the latest version of eFootball from the Play Store, as updates often fix bugs.

4. Restart Your Device: A fresh reboot can resolve stuck processes that might cause a black screen.

5. Ensure Stable Internet Connection: Since eFootball relies on online data, try switching between Wi-Fi and mobile data to rule out a network problem.

6. Reinstall the App: If none of the above works, uninstall and reinstall eFootball. This can repair corrupted files.

If you’ve tried those or if the black screen comes up at a specific point, please share, and I can guide you further with more advanced steps.

Does this help so far? Let me know what you observe or try!