Endpoint configuration manager problem - Snom M3

I did successfully configure an Aastra phone with the new endpoint config manager, but tried to configure a Snom M3 and I’m stumped.

The endpoint config manager does not generate a .cfg file for the M3.
I spent hours trying to get the phone to provision to the tfptboot of the server, but the endpoint manager doesn’t create a .cfg file like it did for the Aastra.

It creates some .htm files, but those are not used by the Snom.

Can anyone give me a hint as to what is wrong here?