Hopefully I can explain this. I typically use two screens when editing (my laptop and a monitor connected with an hdmi), but there are plenty of situations when I dont and then monitor and laptop are not connected at all. When I open a project on mylap top that has missing files, the missing files pop up will want to pop up on the monitor that isnt even connected to my laptop. I then get a black screen on my laptop and cannot do anything because the missing file pop up (that I can not see) is on the disconnected monitor. THis just happened to me so I connected the hdmi from my monitor to my laptop and there was the missing pop up message! How can I fix this??