Hi
Regular guy here, so take this from the perspective that I'm not speaking from a position of any authority, but have you tried a factory reset? Unplug the USB cable to turn the controller off, hold the octave up and down buttons simultaneously, then plug the cable back in. After a few seconds, release the buttons and confirm the reset by pressing the central knob.
If this fails, it's probably going to be best to raise a ticket through your Arturia account, but likely their service center will now be closed for New Year.
Good luck.
