For some reason I'm having this issue now as well after the latest update. It's random - I can make several flights operating normally and then all of a sudden on a subsequent flight, I get the same message. Powering up the aircraft doesn't solve the problem and I have a blank PFD and MFD. I have re-downloaded the aircraft several times now this week and that cures the problem temporarily, until it happens again. I don't see anything in the log.txt file that shows an issue.