Hi! I understand your son's Carnival HUB app on Android is stuck on the first screen, and the Log In and Create buttons aren’t responding. Let’s get this sorted out together.

First, can I ask if you’ve tried any steps already, like closing and reopening the app or restarting the phone? Also, is the device connected to a stable internet connection right now?

Here are some straightforward steps you can try, given the app won’t move past the first screen:

1. Force stop and clear the app cache:
- Go to Settings > Apps & notifications > See all apps > find Carnival HUB
- Tap Force stop
- Then tap Storage & cache > Clear cache
After that, try opening the app again.

2. Check for app updates:
Sometimes login issues are fixed in new versions. Visit the Google Play Store, search for Carnival HUB, and see if there’s an update available. If yes, update the app.

3. Uninstall and reinstall the app:
This can reset any corrupted files that might prevent buttons from working. Long-press the app icon and choose uninstall, then reinstall from the Play Store.

4. Check device permissions:
The app needs certain permissions to function properly. Go to Settings > Apps & notifications > Carnival HUB > Permissions and make sure necessary permissions like storage or internet access are allowed.

5. Try clearing app data if clearing cache didn’t help:
This will reset the app entirely, so login info might need to be re-entered:
Settings > Apps & notifications > Carnival HUB > Storage & cache > Clear storage (or Clear data).

If none of these work, sometimes people have had issues specifically on Android 10 devices related to app responsiveness. In that case, a temporary workaround is to check if using the Carnival HUB website via the browser instead enables the necessary features until an app fix is released.

Please give these a try and let me know what happens. I’m here to help further if needed! Are you able to perform these steps so far?