System not Able to Run - Message

Hi, been using this microwave digester for a couple of months now, and this is the first time happening. When I select the method to use and everything is set to start (as usual), now it shows me this message in red "System Not Able to Run" and doesn't allow me to start the process. Does anyone knows why? (I've already checked; door well closed - wheel on right position - changed method and same message still appears - restarted the microwave, turning it off and on again). Thanks!