No, not that file.
addons/URS<something>/lua/ulx/modules/urs_server.lua
Just to clarify, your problem isn't with ULib (or even ULX).
Your problem is with URS, a community member created project that I'm not even sure works anymore. (Discussed here -
/index.php/topic,5269.0.html )
There is conversation/perhaps updates in later pages. Team Ulysses can't speak for it's current status, as we didn't create or maintain it.
Also, when you say 'downloaded'...make sure you downloaded the ZIP file of all our projects (but you'd only need to put ULib and ULX folders in your server addons)
The zip of our latest code can be found on the lower right of this page -
https://github.com/Nayruden/UlyssesIf you got the zip files from ulyssesmod.net/downloads... though it's our latest 'release', it's several months old and, Gmod has updated many times since and may not be compatible anymore at that link.