Hi there! I see you mentioned "Not working" and asked about troubleshooting the Teuida app. I'd love to help get things running smoothly for you. Could you tell me a bit more about what's happening with the app? For example:

- Does the app fail to open or does it open but doesn't load lessons?
- Are you seeing a blank or black screen?
- Is there any error message or does it freeze at a particular point?
- Have you tried any fixes so far, like restarting the app or your device?

Knowing these details will help me guide you step-by-step to resolve the issue on your Android 10 device using WebKit.

In the meantime, a few quick general fixes often help:

1. Restart your phone.
2. Close the app completely (force stop it) and then reopen it.
3. Check your internet connection (Wi-Fi or mobile data).
4. Clear the app cache:
- Go to Settings > Apps > Teuida > Storage > Clear Cache.

If none of those work, uninstalling and reinstalling the app from Google Play Store can also solve many startup or loading problems.

Let me know what you’ve tried or what exactly you’re seeing, and we’ll take it from there.