This game uses a lot of custom plugins for its user interface etc, to bypass some of RPG Maker's default menus and behaviors.
For that error, you could edit this function in LAMB_Resolution.js, but it's getting complicated.
LAMB.Resolution.getRealScreenResolution = function () { nw.Screen.Init(); var screen = nw.Screen.screens[0]; var scale = screen.scaleFactor; var w = Math.round(scale * screen.bounds.width); var h = Math.round(scale * screen.bounds.height); return { width: w, height: h};
};
Replace with:
LAMB.Resolution.getRealScreenResolution = function () { return { width: 800, height: 600};
};
And instead of 800 and 600 put the resolution of your screen.
But now that I think about it, it's possible the whole interface will be broken because it was made for PC resolutions.

