NUKI Opener with RITTO 6721 as Generic Analog Model

Hi everyone,

I’m having trouble with my opener. In my flat the Ritto 6721 is installed. I did the wiring according to the screenshots attached. I can still use all functions of the intercom system normally (ringing, door opening, voice communication).
As this model is not listed within the Nuki-app I tried to configure it as a Generic - Analog model. Ringing and opening of the door does not work from the app and the configuration process finishes with “Configuration failed”.

Do you have an idea how to fix the installation?

Thanks + Best regards