Hello there! I'm sorry to hear that you're having trouble with the ZUS app closing when you try to open it. Let's work together to resolve this issue.

First, could you let me know if you've tried any troubleshooting steps already, like restarting your device or reinstalling the app? This can help me guide you more effectively.

In the meantime, here are a few steps you can try to solve the problem:

1. Restart Your Device: Sometimes, a simple restart can fix app issues. Just turn your Android device off, wait a minute, and then turn it back on.

2. Clear App Cache:
- Go to Settings on your device.
- Tap on Apps (or Apps & notifications).
- Find and select ZUS from the list.
- Tap on Storage, then click on Clear Cache.

3. Update the App: Make sure that the ZUS app is up to date. You can check this by going to the Google Play Store, searching for ZUS, and seeing if there’s an available update.

4. Reinstall the App: If the above steps don’t work, uninstall the ZUS app and then reinstall it from the Google Play Store. This can sometimes clear up any problems that might exist in the app.

5. Check for Software Updates: Finally, ensure your Android operating system is up to date. Go to Settings > System > System update to check for updates.

Give these steps a try, and let me know how it goes! If the problem persists, I can assist you further. Are you satisfied with the solutions I provided so far?