Hi! I see you're having trouble with the Ice Scream app showing a black screen right after you try to log in as a guest on your WebKit device with Android 15. Let's work through this together.

First, can I ask if you've tried any steps already, like restarting the app or your device? Also, is your app updated to the latest version from your app store? Sometimes older versions can cause display or loading problems.

Here are a few troubleshooting steps to try:

1. Restart the app: Close it completely from your recent apps and open it again.

2. Clear app cache (if possible):
- Go to your device's Settings.
- Tap on Apps or Applications.
- Find Ice Scream.
- Tap Storage and then Clear Cache.
This removes temporary files that might be causing the black screen.

3. Check for app updates: Make sure you have the latest version installed.

4. Check your internet connection: A weak connection could interfere with loading guest session data.

5. Reinstall the app:
- Uninstall Ice Scream.
- Restart your device.
- Reinstall Ice Scream from the app store.

If after these steps the black screen still appears when logging in as a guest, there might be an issue linked to app compatibility or your device’s specific configuration.

Since you mentioned the problem happens only after choosing “log in as guest,” have you tried logging in with another method, like an account or social login, if available? This can help isolate if the issue is with guest login only.

If the problem continues, you can watch a helpful tutorial on fixing Ice Scream black screen errors—which might include steps specific to Android updates and version 15 devices—here: 1.

Let me know what you find or if you've tried any of these already, so I can assist you further! Are you satisfied with this solution so far?