Cube bugs

[Typical 0]

Hi, I have a problem with cube.

If I want to move an object to a cube window, I can not do it.
I need to click the object in the window and then it will be added.

uicube.py: https://pastebin.com/siE2XvdU

game.py: https://pastebin.com/saNHTY1K

interfacemodule.py: https://pastebin.com/LG4W6nX0

Sysser: https://pastebin.com/bKvJhvzQ

 

//Edit

Items can now be moved to cube window, but sysser still shows some error.

https://pastebin.com/DU1PHV5a

 

I apologize for mistakes, my English is weak.

Thanks in advance.