Display Function is not working

[fancasopedia]

Hello guys. When I write Display("TEST"); engine stopped the game and responding like "GUI set as text window but is not actually a text window GUI" that. I created a new game, and copy the gTextBorder properties exactly  the same but bug is still there. Also when I only delete the other GUI' such as gStatusline, game again responding like that. I dont know what I am doing wrong, please help me for that guys, thanks


Edit: Sorry I got it...