since 2 days , the usb output of my nucleus don’t work. I 've a cd ripper link with usb on the nucleus. It works flawlessly at the beginning and now it can(t be powered with the nucleus. The same thing with a HDD connected in usb .
Disconnect all USB devices. Stop Roon, power cycle the Nucleus. Reconnect the USB devices after Roon is running.
By power cycle - you should remove the DC adapter from the power input on the Nucleus too and wait a min or 2 before you reconnect it.
Thanks for your anserws. It seems working now.