Hi there! It sounds like you're encountering an issue where the TrackView app is frequently logging out with the message "Google authentication expired." Let's work through this together.

To better assist you, could you please let me know:
1. How often does this logout happen?
2. Have you noticed if this issue occurs after a specific action, like opening the app or after a certain time period?
3. Do you have any apps like an authenticator or VPN active that might affect your Google account’s authentication?

In the meantime, here are a couple of initial troubleshooting steps you can try:

1. Check Google Account Settings: Make sure your Google account settings are correct and that there are no restrictions on your account. You can do this by going to your Google Account settings on your mobile device.

2. Clear App Cache: Sometimes, clearing the cache of the TrackView app can resolve issues. Go to Settings > Apps > TrackView > Storage and then tap on Clear Cache. After that, restart your device and see if the problem persists.

3. Update the App: Ensure that you have the latest version of TrackView installed. Go to the Google Play Store, search for TrackView, and check if there's an update available.

Please let me know how it goes, and we can escalate to further steps if the issue continues! Are you satisfied with the solutions provided so far?