A world I have been successfully building on for the last 2 years suddenly refuses to open after the 1.9 update. I know it is not my device as this world will not open on another device (windows 10 laptop) I also know it's not the world as another, known to be good, older save of the same world will not load either. I have also created an .mcworld file out of the world files (yes I know how to do this) and attempted to re-import the world into the game without success. The loading/import process begins but never gets past the point shown in the screen shot. The world itself is, because of everything I've built on it, about 60mb, but I've noticed that the size seems to have increased by +/-20mb subsequent to my trying to open it in this update.