Message: Interface/AddOns/BagBrother/core/api/owners.lua line 75:
invalid order function for sorting
Debug:
[string "=(tail call)"]: ?
[string "=(tail call)"]: ?
[string "=[C]"]: ?
[string "=[C]"]: sort()
[string "@Interface/AddOns/BagBrother/core/api/owners.lua"]:75: Sort()
[string "@Interface/AddOns/BagBrother/core/api/owners.lua"]:66: ?()
[string "@Interface/AddOns/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua"]:109:
...Ons/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:109
[string "=[C]"]: ?
[string "@Interface/AddOns/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua"]:19:
...Ons/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:15
[string "@Interface/AddOns/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua"]:54: Fire()
[string "@Interface/AddOns/Ace3/AceEvent-3.0/AceEvent-3.0.lua"]:120:
Interface/AddOns/Ace3/AceEvent-3.0/AceEvent-3.0.lua:119
Locals:
(*temporary) = defined =[C]:-1

I need a lot more information to fix this issue for you.

Appears to be a duplicate of #1678

Not sure i can give much more info but that i always use altest alpha i can get updateing through wowup-cf and that bug happens as i enter game.