Possibile issues
1) Though SPBogie supposedly made group names non-case sensitive, Gamemodes may be? Try changing sandbox to Sandbox
2) You have two ULib groups inherit from user. That may be throwing UTeam off. (Technically, if no inherit from group is specified at all (""), user is assumed.
3) Did it work before you removed spaces? Gmod is picky about whitespace, or at least has been at times.
4) You have no "none" group as specified in our current ULX release version... that too may be throwing ULib off.
4.5) If using ULib SVN, I'm not sure if UTeam is compatible with it.
5) Modified path/lua incorrectly.