Hello @Lorenzo_Mutti,
Make sure that your DAC main firmware as well as your Network Renderer firmware are up to date. The main firmware is updated using the files located at the MSB support page.
The Network Renderer firmware is updated silently in the background. To update the Network Renderer firmware, power on your DAC with the Network Renderer connected to the internet, and allow the unit to idle with no playback for 20 minutes. After 20 minutes has passed, you should power cycle the unit. You will know that the Network Firmware has been updated when it shows in Roon with the name of the DAC (Select II, Reference etc.) instead of “MSB msb-renderer-mk2”. If this process does not work, I would recommend reaching out to MSB support.
-John