Can't Spawn NPCs or Vehicles.

When I try and spawn an NPC I get this error:

sandbox\gamemode\commands.lua:281: attempt to call field ‘Get’ (a nil value)

When I try and spawn a Vehicle I get this error:

sandbox\gamemode\commands.lua:715: attempt to call field ‘Get’ (a nil value)

LUa Virus, clean your LUA folder.