To address the issue of your app closing automatically upon opening, follow these steps:

1. Restart Your Device
Turn off your device completely and then turn it back on. This simple step can sometimes resolve temporary glitches.

2. Update the App
Check if there is an update available for the app. Go to the Google Play Store, search for the app, and if an update is available, install it.

3. Clear App Cache and Data
- Go to Settings on your device.
- Tap on Apps or Applications.
- Find the app in question and select it.
- Tap on Storage.
- Next, tap Clear Cache and then Clear Data.
Note that clearing data may delete any saved information within the app.

4. Uninstall and Reinstall the App
- Go to Settings > Apps, and select the app.
- Tap Uninstall.
- After uninstalling, go back to the Google Play Store and reinstall the app.

5. Check for System Updates
Ensure that your Android operating system is up to date:
- Go to Settings > System > Software Update.
- Tap on Download and Install if an update is available.

6. Check App Permissions
Sometimes the app may not function properly due to missing permissions:
- Go to Settings > Apps, select the app, and then tap on Permissions.
- Ensure that all necessary permissions are granted.

7. Free Up Storage Space
If your device is low on storage, it might affect app performance:
- Go to Settings > Storage.
- Check how much space is available and consider deleting unnecessary files or apps.

8. Reset App Preferences
This will reset preferences for disabled apps, notifications, etc.:
- Go to Settings > Apps.
- Tap on the three dots in the upper right corner and select Reset app preferences.

9. Factory Reset (If Necessary)
As a last resort, if none of the above solutions work, you may need to perform a factory reset. Make sure to back up important data before proceeding:
- Go to Settings > System > Reset > Factory data reset.

If the problem still persists after completing all of these steps, consider reaching out to the app's support team for further assistance. They may provide insights tailored to their specific application.