Hi beka,
I tried but no response from my Nucleus. As Hakan Burkut reported (Nucleus is not working), my Nucleus also does not accept the clean install via Usb stick and f2 f10 etc by USB keyboard. My monitor shows the same screen as Hakan Burkut’s.
And now I have discovered through my monitor screen that the Roon logo disappears and reappears irregularly (every 3-5 minutes). ( Nucleus rebooting?)