WowAce

3x Quartz\modules\Player-Player.lua:132: Attempt to register unknown event "UNIT_SPELLCAST_INTERRUPTIBLE"
[string "=[C]"]: in function `RegisterEvent'
[string "@Quartz\modules\Player-Player.lua"]:132: in function `ApplySettings'
[string "@Quartz\modules\Player-Player.lua"]:52: in function <Quartz\modules\Player.lua:50>
[string "=[C]"]: ?
[string "@Attune\Libs\AceConfig-3.0-3\AceConfigDialog-3.0\AceConfigDialog-3.0-81.lua"]:51: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:49>
[string "@Attune\Libs\AceConfig-3.0-3\AceConfigDialog-3.0\AceConfigDialog-3.0-81.lua"]:847: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:668>
[string "=[C]"]: ?
[string "@Attune\Libs\AceGUI-3.0\AceGUI-3.0-41.lua"]:72: in function <Attune\Libs\AceGUI-3.0\AceGUI-3.0.lua:70>
[string "@Attune\Libs\AceGUI-3.0\AceGUI-3.0-41.lua"]:306: in function `Fire'
[string "@Ace3\AceGUI-3.0-41\widgets\AceGUIWidget-CheckBox.lua"]:68: in function <...ns\Ace3\AceGUI-3.0\widgets\AceGUIWidget-CheckBox.lua:57>

UNIT_SPELLCAST_INTERRUPTIBLE and UNIT_SPELLCAST_NOT_INTERRUPTIBLE were only added in 3.2.0 (WotLK).

I assume some legacy code might have been used, and this might have been overlooked.

You can "comment" out the lines for now, adding -- in front, in modules/Player.lua, Pet.lua and Focus.lua.

-- CastingBarFrame:RegisterEvent("UNIT_SPELLCAST_INTERRUPTIBLE")
-- CastingBarFrame:RegisterEvent("UNIT_SPELLCAST_NOT_INTERRUPTIBLE")

commenting them our worked for me, it only happens on 1 of my computers, I assume it does not register the object if it is not enabled?