A. 1. Ensure that the scooter is powered on and that the app is connected. 2. Check if there are any updates available for the app and install them. 3. Try locking the scooter manually using the physical lock if available, and then attempt to use the app again.

B. 1. Restart the app and try locking the scooter again. 2. If the issue persists, uninstall and reinstall the app to reset its settings.