Ulx menu error

[Shiv]

So I've been playing on this DarkRP server for a while, and I tried using !menu, I'm 99% positive that I've used it in the past. Other servers the !menu command works fine, on this server though, I get a gray screen with a blank tab, please help asap!

My ULib/ULX versions (run "ulx version" in console):
ULib v2.61d
ULX v3.71d

Game mode(s) I am having this problem on: Dark RP

Lua errors shown in console, if any:

Code: [Select]

[ERROR] lua/vgui/dbutton.lua:71: attempt to index field 'Button' (a nil value)
  1. UpdateColours - lua/vgui/dbutton.lua:71
   2. ApplySchemeSettings - lua/vgui/dlabel.lua:116
    3. PerformLayout - lua/vgui/dlabel.lua:132
     4. unknown - lua/vgui/dbutton.lua:90




[JamminR]

See exact same error here.
(Please, in future, use search, I simply searched for "updatecolours" from our front forum page.
https://forums.ulyssesmod.net/index.php/topic,9372.0.html
Stickly Man links to ways to fix in the replies.

XGUI doesn't like derma theme changes. (Is derma even truly supposed to still be used?)