Hi there! I understand your Katasymbol app crashes right after briefly connecting to your printer. Let's get to the bottom of this together.

To start, can you tell me if the printer's Bluetooth is definitely turned on and paired properly with your WebKit device running ChromeOS? Also, have you checked if the app is fully updated to the latest version? Sometimes app crashes happen due to outdated software or Bluetooth connection hiccups.

In the meantime, here’s a simple step-by-step process to try:

1. Ensure Printer is Ready: Make sure the printer is powered on and ready.
2. Restart Devices: Turn off your printer and your WebKit device, then restart both.
3. Clear Bluetooth Connections: On your ChromeOS device, go to Bluetooth settings and remove or "forget" the Katasymbol printer if it's there.
4. Enable Location Services: Some devices require location services enabled for proper Bluetooth operation. Please check in ChromeOS settings if location access is on.
5. Re-pair the Printer: Pair the printer again via Bluetooth fresh — that means search for the device and connect anew.
6. Check App Permissions: Make sure the Katasymbol app has required permissions to access Bluetooth and location.
7. Reinstall the App: If the app still crashes, uninstall it and then reinstall the latest version from the official source.

If you’ve already tried some of these, can you let me know which ones? That way I can guide you with deeper troubleshooting or specific advanced fixes. Also, do you notice if the crash happens instantly on connection, or after trying to print?

Thanks! Let me know how it goes so we can get you printing smoothly again.