`Message: Interface\AddOns\LunaUnitFrames\modules\squares.lua:33: attempt to index local 'vex' (a nil value)
Time: Thu Sep 12 01:59:55 2019
Count: 1
Stack: Interface\AddOns\LunaUnitFrames\modules\squares.lua:33: attempt to index local 'vex' (a nil value)
Interface\AddOns\LunaUnitFrames\modules\squares.lua:33: in main chunk

Locals: Squares =

{
moduleName = "Squares"
moduleKey = "squares"
}
lCD = {
Register = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:687
dataVersions = {
}
guidAccessTimes = {
}
GetAuraDurationByUnit = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:663
Talent = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:159
RegisterCallback = defined @interface\AddOns\AtlasLootClassic\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90
GetAuraDurationByUnitDirect = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:652
AddAura = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:135
UnregisterCallback = defined @interface\AddOns\AtlasLootClassic\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:153
GetDurationForRank = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:678
buffCache = {
}
purgeTicker = {
}
callbacks = {
}
spellNameToID = {
}
NPCSpellTableTimer = {
}
DR_CategoryBySpellID = {
}
UnregisterFrame = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:700
guids = {
}
GetLastRankSpellIDByName = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:674
UnregisterAllCallbacks = defined @interface\AddOns\AtlasLootClassic\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:174
DRInfo = {
}
DR_TypesPVE = {
}
nameplateUnitMap = {
}
Unregister = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:700
spells = {
}
GetAuraDurationByGUID = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:667
GetDataVersion = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:131
RegisterFrame = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:687
UnitAuraWrapper = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:587
UnitAuraDirect = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:567
SetDataVersion = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:126
npc_spells = {
}
frame = {
}
UnitAura = defined @interface\AddOns\ElvUI\Libraries\LibClassicDurations\core.lua:591
buffCacheValid = {
}
}
vex = nil
canCure = {
}
backdrop = {
insets = {
}
bgFile = "Interface\Tooltips\UI-Tooltip-Background"
tileSize = 16
tile = true
}
positions = {
bottomright = "BOTTOMRIGHT"
topleft = "TOPLEFT"
bottomleft = "BOTTOMLEFT"
topright = "TOPRIGHT"
rightcenter = "RIGHTCENTER"
center = "CENTER"
leftcenter = "LEFTCENTER"
}
indicator = "Interface\AddOns\LunaUnitFrames\media\textures\indicator"
SquaresCallback = defined @interface\AddOns\LunaUnitFrames\modules\squares.lua:26
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index local 'vex' (a nil value)"
`

This Lua error is 18 pages long and all I pasted was the first page. I run a fair few addons including elvUI. ElvUI is referenced later in the lua error so I think it could be a conflict.