Hi there! I understand that you're having trouble with your Stray Kids Light Stick V2 when trying to register your ticket—it comes up blank. Let's work together to resolve this!

First, could you please confirm if you have the latest version of the light stick app installed on your Android device? It's important to ensure that the app is up to date to avoid any potential bugs.

Here are a few steps you can try to fix the blank screen issue:

1. Check Bluetooth Connection: Make sure Bluetooth is enabled on your Android device. Then, try turning off your light stick and turning it back on to re-establish the connection.

2. App Permissions: Go to your device settings and check if the app has the necessary permissions (like location and storage access). This could affect how it operates.

3. Clear App Cache: You can clear the app cache by going to Settings > Apps > Stray Kids Light Stick V2 > Storage > Clear Cache. This can help refresh the app’s data.

4. Reinstall the App: If those steps don’t work, uninstall the app completely and then reinstall it from the Google Play Store. Sometimes a fresh install can fix issues like this.

5. Network Connection: Ensure you have a stable internet connection while trying to register. Sometimes a weak connection can cause loading issues in the app.

If you’ve tried all these steps and the issue still persists, it might be a bug within the app itself. In that case, I recommend reaching out for more support, as they might have specific insights or solutions. You can contact Stray Kids support directly at [email protected].

Let me know how it goes! Are you satisfied with the solution I provided?