Hi! I see you're having trouble connecting your Spark Voicemail app to the server and not being able to download voice files. Could you tell me a bit more about when this issue started? For example, did it begin after an app update, device change, or network change?

In the meantime, let's try some initial checks to get your app connected:

1. Check Your Internet Connection: Since your device is on Android 10 using WebKit, make sure your connection is stable—try switching between Wi-Fi and mobile data to see if either works.

2. Restart the App and Device: Close the Spark Voicemail app completely (removing it from your multitasking list) and restart your phone. Then, open the app again.

3. Update the App: Ensure you have the latest version of Spark Voicemail installed from the Google Play Store.

4. Clear App Cache: On Android 10, go to Settings > Apps > Spark Voicemail > Storage > Clear Cache. This can help resolve corrupted temporary files.

If these don’t work, we can dive deeper:
- Check if your account is still logged in properly within the app.
- Review app permissions, especially storage and network access.
- Try uninstalling and reinstalling the app to reset configs.

Does any of this sound like something you've tried already? If yes, let me know which steps and what the results were, so I can focus on more advanced troubleshooting for your Android 10 device.