The dark window is where Rushia should be. It seems that the desktop mascot plug-in doesn't work which I can't help.
btw ResizeEnable is not in my build, I don't know whether that matters.
ResizeEnable is because when I turned it on, I found a mistake that made some of the options not appear
I'll have to wait for the next update to see if there's a chance to fix the black screen.