So before posting this I did reinstall my server and Gmod a few times and tried to use the XGUI with only ULX and ULIB installed on the server, however the menu do open but when I try to use any commands at all it just closes the menu, even when typing the commands in the client console wont work, but in the server console the commands works.
I'm using the latest version of ULX and ULIB. (ULX v3.73 ULib v2.63)
I've been using the github version.
No error at all when trying to use the commands.
You can take a look at this video that is showing what I mean.
https://youtu.be/Ae_pd5iPoMY