Aeon Home Energy Monitor (HEM) - Paper UI Config problem

I have a RPi with Aeon Z-stick reading the watts from the HEM. I tried to update the configuration settings in the paper UI, but they don’t stick (error 404). I went into the log file and see this message.

2017-03-12 08:27:07.421 [INFO ] [] - Received HTTP PUT request for update config at 'things/zwave:device:58f30255:node2/config' for the unknown thing 'zwave:device:58f30255:node2'.

I don’t understand how the thing can be unknown since it is working. Any ideas?