Server Sided EUP and NativeUI

Howdy, I was wondering if any of you know anything about server sided EUP. I am trying to get server sided EUP and i have used it in other servers but cant seem to get it to work in mine, I believe I need NativeUI in it for it to work, except whenever i add it I get an error message trying to load into game “Unable to load resource NativeUI”, thanks!