Hi there! I understand you're having trouble getting NU Carnival to open on your device. Let's work through this together!

First, could you let me know if you've tried any troubleshooting steps so far? Things like restarting your device or reinstalling the app can often help. If you haven't tried those yet, I recommend starting with a quick restart:

1. Restart Your Device: Hold the power button until you see the option to restart. This can solve many minor glitches.

If the app still won't open after restarting, here’s what we can do next:

2. Check for Updates: Make sure both your Android OS and the NU Carnival app are updated to the latest versions. You can check for updates in the Google Play Store.

3. Clear Cache and Data:
- Go to Settings > Apps.
- Find and tap on NU Carnival.
- Select Storage and then tap Clear Cache and Clear Data.

4. Reinstall the App: If it still doesn’t work, try uninstalling the app and then reinstalling it:
- Uninstall it from the same Apps menu.
- Open Google Play Store and install NU Carnival again.

If these steps don’t work, please let me know any error messages you might be seeing or any other specifics about when or how the issue occurs. I'm here to help you get this sorted out!