It appears that your NVR isn’t returning any videoEncoderConfiguration sections in the profiles, which is preventing the app from selecting a source and then fetching the correct snapshot URL.
I’m not sure if the app actually needs that information, as it doesn’t provide a live stream, so I might be able to change the library to cope.
In the meantime, all I can suggest is to try variations of the last number to see if you can fine the required snapshot URL. Tray variations of 102, 201, 202, etc.
