I've been using the MK2 S61 Controller and it's worked so far until today.  The plugins work because I hear sound and I can play them using my laptop keys, but my controller won't even show up under MIDI in the settings.  I made sure everything was up to date, everything is plugged in properly and I haven't updated my computer software yet to Sonoma even though it's available.  Would anyone happen to know why this is happening all of a sudden?