wotlk classic 3.4.1 broke the addon due to API updates: https://wowpedia.fandom.com/wiki/Patch_3.4.1/API_changes

Message: Interface/AddOns/EMA/Modules/Quest-Classic.lua:254: Usage: SecureHook([object], method, [handler]): Attempting to hook a non existing target Time: Wed Jan 18 15:25:09 2023 Count: 1 Stack: Interface/AddOns/EMA/Modules/Quest-Classic.lua:254: Usage: SecureHook([object], method, [handler]): Attempting to hook a non existing target [string "=[tsm error check]"]:1: in main chunk [string "=(tail call)"]: ? [string "=(tail call)"]: ? [string "=[C]"]: ? [string "@Interface/AddOns/BigDebuffs/Libs/AceHook-3.0/AceHook-3.0.lua"]:210: in function <...e/AddOns/BigDebuffs/Libs/AceHook-3.0/AceHook-3.0.lua:118> [string "@Interface/AddOns/BigDebuffs/Libs/AceHook-3.0/AceHook-3.0.lua"]:340: in function SecureHook'
[string "@Interface/AddOns/EMA/Modules/Quest-Classic.lua"]:254: in function <Interface/AddOns/EMA/Modules/Quest-Classic.lua:239>
[string "=[C]"]: ?
[string "@Interface/AddOns/BigDebuffs/Libs/AceAddon-3.0/AceAddon-3.0.lua"]:66: in function <...AddOns/BigDebuffs/Libs/AceAddon-3.0/AceAddon-3.0.lua:61>
[string "@Interface/AddOns/BigDebuffs/Libs/AceAddon-3.0/AceAddon-3.0.lua"]:523: in function `EnableAddon'
[string "@Interface/AddOns/BigDebuffs/Libs/AceAddon-3.0/AceAddon-3.0.lua"]:626: in function <...AddOns/BigDebuffs/Libs/AceAddon-3.0/AceAddon-3.0.lua:611>

Locals: `

Message: .../AddOns/EMA/Libs/LibBagUtils-1.0/LibBagUtils-1.0.lua:356: attempt to call upvalue 'GetContainerNumFreeSlots' (a nil value) Time: Wed Jan 18 15:25:10 2023 Count: 1 Stack: .../AddOns/EMA/Libs/LibBagUtils-1.0/LibBagUtils-1.0.lua:356: attempt to call upvalue 'GetContainerNumFreeSlots' (a nil value) [string "=[tsm error check]"]:1: in main chunk [string "=(tail call)"]: ? [string "=[C]"]: ? [string "@Interface/AddOns/EMA/Libs/LibBagUtils-1.0/LibBagUtils-1.0.lua"]:356: in function CountSlots'
[string "@Interface/AddOns/EMA/Modules/Toon.lua"]:2020: in function ?' [string "@Interface/AddOns/BigDebuffs/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua"]:109: in function <...ffs/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:109> [string "=[C]"]: ? [string "@Interface/AddOns/BigDebuffs/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua"]:19: in function <...ffs/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:15> [string "@Interface/AddOns/BigDebuffs/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua"]:54: in function Fire'
[string "@Interface/AddOns/BigDebuffs/Libs/AceEvent-3.0/AceEvent-3.0.lua"]:120: in function <...AddOns/BigDebuffs/Libs/AceEvent-3.0/AceEvent-3.0.lua:119>

Locals: `

fixed in Release-v4.3(0231)