Sent him a message. Thanks.

Hi,

the GUI mod was created by our member Scene, unfortunately he's not updated it in a long time. It's quite possible it's not fully compatible anymore with the latest version.
Maybe it is possible to change the color of the text from black to something else, however I for one have sadly no idea about the GUI mod.

You could try contacting the original author maybe:
https://www.ao-universe.com/forum/memberlist.php?mode=viewprofile&u=2202

Hello,

I've recently done a fresh install of AO and installed AOU mod. When I load it up, everything looks fine except when I hover over an item/nano or shift click. The title text is black. Is there any way to fix this? See link for pictures.
[url]https://imgur.com/a/E7sP8tE[/url]