Well, you know... when in trouble... back to basics. Go to X-Plane 11/Output and rename the folder preferences (something like preferences_old). Start X-Plane and it will create a new preferences folder with standard preferences. That probably will fix your problem and the simulator will work.
Then you can try passing each document, one by one, from preferences_old to the new one, to determine which one had the problem. In my case, X-Plane.prf, which is the one with graphics and sound settings. But with the new one things go fine. So, I consider my problem solved.
[EDITED] I think the problem is with HDR graphics. When I move the graphics quality to high(HDR) the same message appears.