Hi there! Sorry to hear you're having trouble logging into Blurrr Music Video Editor with that "log in failed" message. To help you better, could you let me know if you get this error right after entering your credentials, or does it happen after some loading? Also, are you connecting through Wi-Fi or mobile data? Any additional info on what you’ve tried so far would be great.

Meanwhile, I can guide you through some common steps to fix login issues on Android 10 with the Blurrr app:

1. Check Your Internet Connection: Make sure your Wi-Fi or mobile data is stable and working. Sometimes a weak connection causes login to fail.

2. Restart the App: Close the Blurrr app completely (force stop if needed) and reopen it.

3. Clear App Cache and Data:
- Go to Settings > Apps > Blurrr Music Video Editor.
- Tap Storage, then Clear Cache first.
- If that doesn’t help, try Clear Data as well (note this may reset any saved info inside the app).

4. Update the App: Head to Google Play Store and ensure Blurrr is updated to the latest version.

5. Reinstall the App: If the problem persists, uninstall Blurrr from your device completely, then reinstall it from Google Play Store.

6. Check Account Credentials: Double-check the username/email and password you’re entering. If you use social login (Google, Facebook, etc.), try logging in through the same method on their native app or website to verify access.

7. Device Date & Time Settings: Ensure your device’s date and time are set automatically. Incorrect time settings can cause login and security errors.

If after these steps the issue still happens, we might want to check if there’s any reported server outage or account-specific problem. Let me know how it goes or what details you can share! I’m here to help.