Hi Karsten,
this is the error from a direct path.

SyntaxError: \u can only be followed by a Unicode character sequence

line 1

1: >> moi.ui. createDialog ('D:\MoI V4 beta\ui\ nodeeditor.v.0.99.2017.12.18/index. html', 'resizeable,defaultWidth:680 , defaultHight:420',moi.ui.mainWindow );

Barry