Hi! I understand you're having trouble logging into the Dorian app through Google, and it says it has trouble reopening the app and won't sign you in. Let’s work together to get this fixed.

To start, could you tell me if this happens every time you try to sign in or just occasionally? Also, do you see any specific error messages besides the reopening issue? This helps me figure out the best next steps.

Meanwhile, here are some straightforward steps we can try that usually help fix Google login issues on Android devices with Android 10:

1. Clear Cache and Data for Dorian App and Google Play Services:
- Open your device’s Settings.
- Tap Apps or Apps & notifications, then See all apps.
- Find and tap on Dorian.
- Tap Storage & cache.
- Tap Clear cache first, then Clear storage or Clear data.
- Repeat the same for Google Play Services and Google Play Games if available.

2. Restart Your Device:
After clearing the caches, restart your phone to refresh all services.

3. Check Date and Time Settings:
- Go to Settings > System > Date & time.
- Ensure Automatic date & time and Automatic time zone are enabled. Incorrect time settings can cause login issues.

4. Ensure the Dorian App is Updated:
- Open Google Play Store.
- Search for Dorian.
- If there’s an update available, tap Update.

5. Try Reinstalling the Dorian App:
- Uninstall the app.
- Reboot your device.
- Reinstall the app fresh from the Play Store.

If you’ve already done some of these, please let me know which, and we can try some advanced troubleshooting.

Also, make sure your internet connection is stable (try switching between Wi-Fi and mobile data).

If these steps don’t resolve the issue, there might be an authentication glitch between the app and Google accounts that we can dig into further.

Does this sound good to start with? Are you comfortable following these steps?