Carbonite\NxUI.lua:5699: attempt to index field '?' (a nil value)

[Twink]

The following bug appeared every time something was under attack.

I was in Stormheim and Whisperwind's Citadel was under attack (yellow text in chat).
Each message caused a new error.

Message: Interface\AddOns\Carbonite\NxUI.lua:5699: attempt to index field '?' (a nil value)
Time: 09/01/16 01:31:37
Count: 639
Stack: Interface\AddOns\Carbonite\NxUI.lua:5699: in function `Update'
Interface\AddOns\Carbonite.Social\NxSocial.lua:1681: in function `Update'
Interface\AddOns\Carbonite.Social\NxSocial.lua:862: in function `?'
Interface\AddOns\Carbonite\NxUI.lua:2875: in function <Interface\AddOns\Carbonite\NxUI.lua:2866>

Locals: self = <table> {
 SelFrm = <unnamed> {
 }
 LineHPad = 0
 MinW = 2
 Vis = 1
 Save = <table> {
 }
 Data = <table> {
 }
 UserFunc = <function> defined @Interface\AddOns\Carbonite.Social\NxSocial.lua:1294
 MinH = 1
 HdrFrm = <unnamed> {
 }
 SSH = 643.19995117188
 Num = 0
 Columns = <table> {
 }
 User = <table> {
 }
 SSW = 945.99987792969
 Sorted = false
 Buts = <table> {
 }
 UsedFrms = <table> {
 }
 Top = 1
 Font = "Fon*****dium"
 Selected = 0
 Frm = <unnamed> {
 }
 FontObj = NxFontM {
 }
 Strs = <table> {
 }
 HdrH = 12
 Slider = <table> {
 }
}
showLast = nil
lineH = 12
hdrH = 12
last = 0
strNum = 2
cNum = 2
(for generator) = <function> defined =[C]:-1
(for state) = <table> {
 1 = <table> {
 }
 2 = <table> {
 }
 3 = <table> {
 }
 4 = <table> {
 }
 5 = <table> {
 }
 6 = <table> {
 }
}
(for control) = 2
k = 2
column = <table> {
 Name = "Character"
 FStr = <unnamed> {
 }
 FontObj = NxFontM {
 }
 JustifyH = "LEFT"
 Data = <table> {
 }
 Width = 110
}
(for index) = 2
(for limit) = 2
(for step) = 1
n = 2
(*temporary) = nil
(*temporary) = nil
(*temporary) = ""
(*temporary) = <userdata>
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index field '?' (a nil value)"
L = <table> {
 Fireweed = "Fireweed"
 Dragonblight = "Dragonblight"
 Bloodwatcher Point, Badlands = "Bloodwatcher Point, Badlands"
 Westfall = "Westfall"
 Abyssal Depths = "Abyssal Depths"
 Stormshield = "Stormshield"
 Options have been reset for the new version. = "Options have been reset for the new version."
 Archaeology Blob Transparency = "Archaeology Blob Transparency"
 Map Mouse Button Binds = "Map Mouse Button Binds"
 Shadowmoon Village, Shadowmoon Valley = "Shadowmoon Village, Shadowmoon Valley"
 Opening = "Opening"
 Darnassus = "Darnassus"
 Menus = "Menus"
 Gilneas = "Gilneas"
 Reset global options = "Reset global options"
 Left-Click to Toggle Map = "Left-Click to Toggle Map"
 Imported = "Imported"
 Un'Goro Crater = "Un'Goro Crater"
 Dustwind Dig, Badlands = "Dustwind Dig, Badlands"
 Stygian Bounty, Vashj'ir = "Stygian Bounty, Vashj'ir"
 Kirthaven, Twilight Highlands = "Kirthaven, Twilight Highlands"
 Western Plaguelands = "Western Plaguelands"
 The Jade Forest = "The Jade Forest"
 Middle-Click to Toggle Guide = "Middle-Click to Toggle Guide"
 Large Timber = "Large Timber"
 Shrine of Seven Stars = "Shrine of Seven Stars"
 Max Vendors To Record = "Max Vendors To Record"
 Crypt of Forgotten Kings = "Crypt of Forgotten Kings"
 Left click toggle Map = "Left click toggle Map"
 Flamestar Post, Burning Steppes = "Flamestar Post, Burning Steppes"
 Sets the action performed when middle clicking holding CTRL = "Sets the action performed when middle clicking holding CTRL"
 Report Status = "Report Status"
 Winterspring = "Winterspring"
 Main Options = "Main Options"
 Flying = "Flying"
 Com %d Bytes sec %d = "Com %d Bytes sec %d"
 Darkshore = "Darkshore"
 Dark Heart of Pandaria = "Dark Heart of Pandaria"
 Paladin Trainer = "Paladin Trainer"
 Small Font = "Small Font"
 Frostweed = "Frostweed"
 Show Received Levelups = "Show Received Levelups"
 Gold Vein = "Gold Vein"
 Onyxia's Lair = "Onyxia's Lair"
 Apexis Excavation, Spires of Arak = "Apexis Excavation, Spires of Arak"
 When