Hi @Louis_Pengue,
As others have mentioned here, Roon does not support DLNA/UPnP and there we have no plans to integrate this type of streaming technology into Roon.
If you wish to use the Classe with Roon you will need to connect it via USB directly to the Core, use a Roon Ready endpoint (such as Allo USBridge/Sonore Micro|UltraRendu) to facilitate the USB connection to the Classe or use a Sonore UPnP Bridge (Note: I have not previously used the Sonore UPnP Bridge so please verify comparability with your DAC first).
Hope this helps!
– Noris