Hi there! I see you're having trouble logging back into the Tingles app using the "Continue with Google" option and encountering a "Sign-In Error" popup. Let's work through this together.

To start, can you tell me if you've tried any steps so far, like restarting your device, checking your Google account status, or clearing app data? Also, does this problem happen only with Tingles, or are you unable to sign in with Google on other apps/websites as well?

In the meantime, here is a step-by-step approach we can try for your Android 16 device:

1. Check Internet Connection: Ensure you have a stable internet connection—Wi-Fi or mobile data.

2. Clear Cache and Data for Tingles App:
- Go to Settings > Apps > find Tingles.
- Tap Storage & cache.
- Tap Clear Cache and then Clear Storage/Data.
This refreshes the app's stored login information.

3. Check Google Account Status:
- Open your browser and sign in directly to your Google Account.
- Ensure the account is active and there are no security issues or prompts needing your attention.
- Also verify that third-party access for Tingles is enabled (you can check this in your Google Account’s security settings).

4. Update or Reinstall Tingles App:
- Check the Google Play Store to see if there’s an update available for Tingles.
- If yes, update it.
- If no, try uninstalling and reinstalling the app to reset its integration with Google Sign-In.

5. Remove and Re-add Google Account on Your Device:
- Go to Settings > Accounts.
- Select your Google Account and remove it from your device.
- Restart the device.
- Add the Google Account back and then try logging into Tingles again.

6. Check for Device System Updates:
- Sometimes, system updates fix authentication issues.
- Go to Settings > System > System update and install any available updates.

7. Try Signing In Through a Different Method:
- Does Tingles offer sign-in via email or another social log-in? If yes, try using that to regain access.

If after these steps the problem persists, it might be related to Google’s third-party connection issues or app permissions (sometimes apps get temporarily blocked). In that case, I can guide you on checking those deeper account or permission settings.

Please try the steps you haven’t done yet and let me know which step you are on or if you need help with any particular step. I’m here to help!

Are you satisfied with this initial guidance?