Trinket PvP WA LUA Error

1750x [string "return function()..."]:7: attempt to perform arithmetic on field '?' (a nil value)
[string "return function()..."]:7: in function <[string "return function()..."]:1>
WeakAuras\RegionTypes\icon.lua:226: in function `UpdateCustomText'
WeakAuras\WeakAuras-2.0.9.9.lua:5119: in function <WeakAuras\WeakAuras.lua:5115>

Locals:
customTextFunc = <function> defined return function()
    if type(pvptrinketcds) ~= "table" then
        pvptrinketcds = {}
    end
    targetGUID = UnitGUID("target")
    if targetGUID then
        local cooldown = 120 - (time() - pvptrinketcds[targetGUID])
        if cooldown <= 0 then
            pvptrinketcds[targetGUID] = nil
        end
        return cooldown
    end
end





















:1
region = <unnamed> {
 0 = <userdata>
 values = <table> {
 }
 frameId = "pvp_-_trinket_cd"
 Color = <function> defined @WeakAuras\RegionTypes\icon.lua:186
 duration = 0
 Expand = <function> defined @WeakAuras\WeakAuras.lua:3839
 expirationTime = 1.#INF
 SetDurationInfo = <function> defined @WeakAuras\RegionTypes\icon.lua:431
 stacks = <unnamed> {
 }
 SetIcon = <function> defined @WeakAuras\RegionTypes\icon.lua:252
 GetColor = <function> defined @WeakAuras\RegionTypes\icon.lua:197
 button = <unnamed> {
 }
 icon = <unnamed> {
 }
 color_g = 1
 color_b = 1
 Collapse = <function> defined @WeakAuras\WeakAuras.lua:3827
 color_r = 1
 PreShow = <function> defined @WeakAuras\RegionTypes\icon.lua:434
 MSQGroup = <table> {
 }
 SetName = <function> defined @WeakAuras\RegionTypes\icon.lua:268
 Scale = <function> defined @WeakAuras\RegionTypes\icon.lua:370
 color_a = 0.78000000119209
 SetStacks = <function> defined @WeakAuras\RegionTypes\icon.lua:243
 cooldown = WeakAurasCooldownpvp_-_trinket_cd {
 }
 UpdateCustomText = <function> defined @WeakAuras\RegionTypes\icon.lua:225
}
values = <table> {
 stacks = 1
 icon = "|TIcons\inv_jewelry_trinketpvp_02:12:12:0:0:64:64:4:60:4:60|t"
 name = "PvP - Trinket CD"
}
UpdateText = <function> defined @WeakAuras\RegionTypes\icon.lua:205