Hi there! Let me make sure I understand your situation correctly: Your Starlight app won't connect to the internet when you're using your normal WiFi network on your Android 15 device with the WebKit browser, right?

To help you out, let's try a few things step-by-step:

1. Check WiFi Connection: First, confirm that your device is connected to the WiFi network and that other apps or browsers can access the internet properly. Sometimes WiFi might be active but not really connected to the internet.

2. Restart Your Device and Router: Restart your Android device as well as your WiFi router. This can clear up temporary glitches that might be blocking the app’s connection.

3. Reinstall the Starlight App: Uninstall the app, then download and reinstall it again from a trusted store or source. This can fix corrupted files or update the app to the latest version.

4. Reset Network Settings: On your Android 15 device, go to Settings > System > Reset options > Reset Wi-Fi, mobile & Bluetooth (or similar wording). After that, reconnect to your WiFi by entering the password again.

5. Allow Permissions: Make sure the Starlight app has all the required permissions enabled, particularly for network access.

6. Check for VPN or Proxy: If you use a VPN or any proxy on your device, try disabling it temporarily, as this can interfere with the app’s ability to connect.

7. App-Specific Connection: Sometimes the Starlight app may require connection directly to a particular WiFi (like Starlink WiFi if you have that hardware). Ensure you are connected to the correct WiFi network the app is designed for.

If after all this the app still won't go online, it might be a more specific issue with the app or your network setup, and we can dig deeper or look for updates/fixes from the developer.

Could you let me know which exact steps you’ve already tried and if you have any special network setup (like VPN, custom DNS, firewall) on your router or device? This will help me guide you further!