I need help with this strand of ulx errors

[blue]

[ulib] addons/ulib/lua/ulib/shared/cami_ulib.lua:18: [ULIB] Unauthed player
  1. query - [C]:-1
   2. fn - addons/ulib/lua/ulib/shared/cami_ulib.lua:18
    3. Call - addons/ulib/lua/ulib/shared/hook.lua:109
     4. PlayerHasAccess - gamemodes/darkrp/gamemode/libraries/sh_cami.lua:383
      5. updatePrivs - gamemodes/darkrp/gamemode/modules/doorsystem/cl_doors.lua:8
       6. fn - gamemodes/darkrp/gamemode/modules/doorsystem/cl_doors.lua:14
        7. unknown - addons/ulib/lua/ulib/shared/hook.lua:109


If someone could tell me what would be causing these errors and how to fix them that would be much appreciated. Thank you.

[Timmy]

Three possible causes so far. Ordered from most likely to least likely:

• An addon is breaking the auth hook.
  Fix: remove offending addon.
• Missing or invalid garrysmod/settings/users.txt file.
  Usually accompanied by this error: lua/includes/extensions/player_auth.lua:66: bad argument #1 to 'KeyValuesToTable' (string expected, got no value)
  Fix: put default users.txt in garrysmod/settings (attached to this post).
• This weird autorefresh issue.
  Fix: disable autorefresh and/or hibernation.