@ drocfrosh,
We would surely get a confirmation, whenever, any sensor is added and that can be found under "Connected Sensors". If the sensor is not being added then please do the removal process once.
--> Tap on Add Sensor--> Remove (Single remove only)
--> Follow the removal process on the Door lock.
If everything goes well, we should receive the message "Unknown sensor removed" only then, we can add it back and then proceed with the user codes via LCD UI.