Platform: Xbox.      problem: Game closes

GT : Stirpem Ultimam.        location: Terra/Germany

Long discription in bad english

I cant load the 3rd or 4th mission ( nest of the viper) the game closes after loadin screen . Im on the xbox1 and the first time i played the campain with my main( crusader) i havent such a problem. But now with the psyker.. Going to bed now . Maybe tommorow im aible to clean the universe again....