I should add that it happened earlier today w/o any MFC or ext controllers hooked up.
Make sure that your expression cables are actually connected, including the volume pedal (sometimes the chassis of my Boss pedal will cause my right-angle TRS cable to back out of the jack slightly, just enough to open the circuit).
Make sure that the expression pedal CC assignments for the AXE and MFC are mapped correctly.
Review setup videos by Chris@KatsuKuriMedia - Chris is the real deal man! Good luck
what exactly happened? no sound?
Input meter shows signal but no output. Shut it off, yurn it back on and it works correctly. I'm going to try reloading the firmware to see if that fixes the issue