[Help needed] Fixing an old ulx skin. [ApplySchemeSettings]

fixed

Post your code, we can’t see what you’re doing wrong just by looking at your error

Well I realize this, but, the problem is I don’t know what script is causing it; there is multiple lua files.
The error is happening in a file called dlistview.lua
You can access it by garrysmod > lua > vgui > dlistview.lua

But I suppose, I’ll just upload all scripts.

Well, to begin with, the files you’ve linked is one of my old CoderHire scripts; so I would very much appreciate it if you did not leak it on Facepunch…

However, there are no indications that my addon is causing those errors; but to confirm this, try see if the error is still occurring on a new Server installation.