To resolve the issue with the VicoHome app not working and giving you an error during sign-in, follow these thorough steps:

1. Check Internet Connection: Ensure that your device is connected to a stable Wi-Fi network. A weak connection may hinder the app's ability to sign in. Try switching between Wi-Fi and mobile data to see if that resolves the problem.

2. Clear App Cache:
- Go to your device's Settings.
- Tap on Apps or Applications.
- Locate and select VicoHome.
- Tap on Storage and then select Clear Cache. This action can help resolve any temporary issues causing the app to malfunction.

3. Reinstall the App:
- Uninstall the VicoHome app from your device. To do this, tap and hold the app icon and choose Uninstall.
- After the uninstallation, go to the Google Play Store and reinstall the VicoHome app.
- Once reinstalled, try signing in again.

4. App Permissions:
- Ensure that the VicoHome app has the necessary permissions.
- Go back to Settings > Apps > VicoHome > Permissions and check if all required permissions are granted, such as access to the camera, storage, and location.

5. Check for App Updates: Sometimes, an outdated version of the app can lead to functionality issues. In the Google Play Store, search for VicoHome and ensure that you have the latest version installed.

6. Restart Your Device: After you have made these changes, restart your phone. This step helps refresh the system and can sometimes clear up residual issues.

7. Check for System Updates: Ensure your Android operating system is up to date:
- Go to Settings > System > System update and check for any available updates.

8. Contact Support: If the issue persists after trying all these steps, it may be beneficial to contact VicoHome support for further assistance. You can find support articles or contact options directly on their official website.

By following these detailed steps, you should be able to resolve the sign-in error with the VicoHome app. If you need more information, consider checking for any known issues or additional help on VicoSafe's site - learn more.