Hi there! I see you're encountering an activation error with the NCAA March Madness Live app on your Android device using WebKit browser. Let's work through this together to get you up and running.

To start, can you tell me if you are trying to activate the app on a TV or streaming device, or directly on your Android device/browser? Also, have you previously been able to activate successfully, or is this the first time? Any extra details will help me guide you better.

In the meantime, here are some general steps that often resolve activation errors:

1. Clear Browser Cache and Data: Since you're using a WebKit browser on Android 10, clearing cache and cookies can remove any corrupted data that might cause activation issues.
- Go to your device's Settings > Apps > select your WebKit browser > Storage > Clear Cache and Clear Data.

2. Ensure Your Internet Connection is Stable: Sometimes activation errors happen due to connection issues. Try switching between Wi-Fi and mobile data or resetting your router.

3. Log Out and Back In: If you have a March Madness account, try signing out from the app or website, then signing back in to refresh your credentials.

4. Use the Official Activation Page: To activate your device or browser, visit the official NCAA March Madness Live activation page at https://www.ncaa.com/activate and follow the instructions carefully.

5. Update Browser or App: Though you’re on Android 10, make sure your browser is up to date. If you're using an app instead, ensure it’s the latest version.

If these steps don’t help, it might require more specific troubleshooting like checking for account authorization issues or app reinstall.

Could you please let me know which of these steps you’ve tried so far? That way, I can suggest the next best actions for you.