Hi there! Sorry to hear you're encountering an "Unknown error" when trying to sign in to the Donkey Republic app on your Android 10 device. Let's work together to get this sorted out.

To help me better understand, can you tell me if this error shows up immediately when you open the app, or only after you input your login details and try to sign in? Have you recently updated the app or changed your account password?

In the meantime, here are some steps we can try to fix this:

1. Check Internet Connection: Make sure you have a stable internet connection, either Wi-Fi or mobile data.

2. Force Stop and Clear Cache:
- Go to your device's Settings > Apps > Donkey Republic.
- Tap "Force Stop," then go to "Storage" and select "Clear Cache."
- Try opening the app and signing in again.

3. Update the App: Check the Google Play Store to ensure you have the latest version installed. Sometimes bugs causing errors are fixed in updates.

4. Restart Your Device: A simple restart can often solve temporary glitches.

5. Reinstall the App: If the above doesn't work, uninstall the Donkey Republic app and reinstall it from the Play Store.

If you’ve already tried any of these, please let me know which ones, and we can look into more advanced troubleshooting like checking account status or server issues.

Are you ready to give these steps a try?