I solved this Problem with: After Login in Wow, type /reload in Chat. No errors after

Somehow the mouseover tooltip for quest tracking wasn't working anymore as of today.  I was able to fix it by running this command:

/console showQuestTrackingTooltips 1

You can read more about it here:

https://us.battle.net/support/en/article/45367

Getting this error in 8.2.

311x TipTac\ttStyle.lua:247: attempt to index local 'gttLine' (a nil value)
TipTac\ttStyle.lua:247: in function `ModifyUnitTooltip'
TipTac\ttStyle.lua:287: in function `?'
TipTac\ttCore.lua:297: in function `SendElementEvent'
TipTac\ttCore.lua:656: in function `ApplyUnitAppearance'
TipTac\ttCore.lua:818: in function <TipTac\ttCore.lua:779>
[C]: ?
[C]: ?
[C]: ?

Locals:
self = <table> {
GenerateTargetLines = <function> defined @TipTac\ttStyle.lua:80
OnLoad = <function> defined @TipTac\ttStyle.lua:256
GenerateNpcLines = <function> defined @TipTac\ttStyle.lua:180
GeneratePetLines = <function> defined @TipTac\ttStyle.lua:149
GeneratePlayerLines = <function> defined @TipTac\ttStyle.lua:101
name = "Style"
ModifyUnitTooltip = <function> defined @TipTac\ttStyle.lua:204
OnCleared = <function> defined @TipTac\ttStyle.lua:290
OnStyleTip = <function> defined @TipTac\ttStyle.lua:260
}
u = <table> {
isPlayer = false
reactionIndex = 4
isPetWild = false
class = "Mission Command Table"
classID = "WARRIOR"
powerType = 1
token = "mouseover"
name = "Mission Command Table"
reactionColor = "|cffffff00"
title = "|cffc0c0c0Level 110 |cffffffffUnknown"
isPetCompanion = false
}
first = true
unit = "mouseover"
level = 110
classification = "normal"
gttLine = nil
(*temporary) = "GameTooltipTextLeft3"
(*temporary) = nil
(*temporary) = <table> {
}
(*temporary) = "count"
(*temporary) = "count"
(*temporary) = "attempt to index local 'gttLine' (a nil value)"
UnitName = <function> defined =[C]:-1
cfg = <table> {
fontFace = "Addons\Prat-3.0\fonts\Enigma__2.ttf"
classification_elite = "Level %s|cffffcc00 Elite"
barHeight = 8
overrideFade = false
if_enable = true
tipBackdropEdge = "Addons\LUI\media\textures\borders\Stripped.tga"
optionsLeft = 911.238281
backdropEdgeSize = 14
if_showSpellIdAndRank = true
powerBar = true
anchorFrameUnitPoint = "TOP"
showAuraCooldown = false
mouseOffsetX = 0
iconFaction = false
anchorFrameUnitType = "normal"
barTexture = "LUI\media\textures\statusbars\Minimalist.tga"
classification_normal = "Level %s"
showHiddenTipsOnShift = true
showDebuffs = false
hideWorldTips = false
barFontFace = "Addons\Prat-3.0\fonts\Enigma__2.ttf"
noCooldownCount = false
classification_minus = "-%s "
showGuildRank = true
modifyFonts = true
if_showItemLevelAndId = false
if_itemQualityBorder = true
showBuffs = false
anchorWorldTipType = "normal"
enableChatHoverTips = true
auraSize = 25
barsCondenseValues = true
left = 113.000023
optionsBottom = 546.375122
manaBar = true
classification_worldboss = "Level %s|cffff0000 Boss"
updateFreq = 0
classification_trivial = "~%s "
backdropInsets = 0
iconSize = 24
anchorFrameTipType = "normal"
if_borderlessIcons = false
anchorWorldTipPoint = "TOP"
colorNameByClass = false
anchorWorldUnitPoint = "TOP"
classColoredBorder = false
anchorWorldUnitType = "normal"
classification_rareelite = "Level %s|cffffaaff Rare Elite"
targetYouText = "<<YOU>>"
classification_rare = "Level %s|cffff66ff Rare"
top = 412.999939
mouseOffsetY = 200
gradientTip = false
tipBackdropBG = "Buttons\WHITE8X8"
talentCacheSize = 50
aurasAtBottom = false
anchorFrameTipPoint = "TOP"
gttScale = 1
}
lineInfo = <table> {
1 = "|cffc0c0c0"
2 = "Level 110"
3 = " "
4 = "|cffffffff"
5 = "Unknown"
count = 5
Index = 3
}
tt = TipTac {
CreatePushArray = <function> defined @TipTac\ttCore.lua:268
elements = <table> {
}
RegisterElement = <function> defined @TipTac\ttCore.lua:288
MirrorAnchorsSmart = <table> {
}
CURSOR_UPDATE = <function> defined @TipTac\ttCore.lua:326
yPadding = 13
tipsToModify = <table> {
}
SendElementEvent = <function> defined @TipTac\ttCore.lua:294
playerLevel = 120
isColorBlind = false
GetUnitReactionIndex = <function> defined @TipTac\ttCore.lua:566
CVAR_UPDATE = <function> defined @TipTac\ttCore.lua:394
ApplySettings = <function> defined @TipTac\ttCore.lua:469
AddModifiedTip = <function> defined @TipTac\ttCore.lua:945
0 = <userdata>
AddTargetedBy = <function> defined @TipTac\ttCore.lua:592
u = <table> {

I use GottaGoFast addon for MM+ timer and mobs point.

When I mouseover a mob, the % that this mobs add to the total should be showed and I don't know why there is a problem with tiptac.

The % is showed for 1 sec then disapears, Are you aware about it ?

Is there a way to fix it ?

disabling TipTacItemRef from the package solved all my problems with lua errors. fyi i've enable only TipTac and TipTacOptions - works fine, but still hope for dev to update it ;) 

In reply to unvoided:

Thanks for the tip! This worked for me on a new character but not an existing one.

Here's what I did to fix LUA errors on an existing character:

(Note: I still had to disable TipTacItemRef)

-------------------------------------------------------------------

1) Close WoW.

2) Go to the WoW\WTF folder for your character.

 - Example folder location, "C:\Program Files\World of Warcraft\_retail_\WTF\Account\<account-name>\<server-name>\<char-name>".

3) Find and open the TXT file named: "layout-local.txt".

 - This file contains UI frame locations/sizes for the specified character.

4) Look for the line "Frame: TipTac"

5) Delete the line "Frame: TipTac" and all the following lines associated with it.

 - Example lines to delete:

 - - > Frame: TipTac

 - - > FrameLevel: 11

 - - > Anchor: RIGHT

 - - > X: -352

 - - > Y: -236

 - - > W: 114

 - - > H: 24

6) Save and close the TXT file.

7) Open WoW back up.

8) Make sure TipTacItemRef is still disabled.

9) Log on with your character and verify no LUA errors.

In reply to nathanondorf:

 Oh wow! This is really helpful, thank you! The errors only happened on 1 of my characters ( 1 of 18), I really got no idea, finally got sovled!

Message: Interface\FrameXML\GameTooltip.lua:154: Action[SetPoint] failed because[SetPoint would result in anchor family connection]: attempted from: GameTooltip:SetPoint.
Time: Tue Jul 2 20:19:20 2019
Count: 5
Stack: Interface\FrameXML\GameTooltip.lua:154: Action[SetPoint] failed because[SetPoint would result in anchor family connection]: attempted from: GameTooltip:SetPoint.
[C]: in function `SetPoint'
Interface\FrameXML\GameTooltip.lua:154: in function <Interface\FrameXML\GameTooltip.lua:152>
[C]: in function `GameTooltip_SetDefaultAnchor'
[string "*:OnTooltipSetDefaultAnchor"]:1: in function <[string "*:OnTooltipSetDefaultAnchor"]:1>

Locals: (*temporary) = GameTooltip {
0 = <userdata>
ItemTooltip = <unnamed> {
}
SetHyperlink = <function> defined =[C]:-1
SetGuildBankItem = <function> defined =[C]:-1
comparing = false
TopOverlay = <unnamed> {
}
default = 1
SetUnitDebuff = <function> defined =[C]:-1
SetLootItem = <function> defined =[C]:-1
SetQuestItem = <function> defined =[C]:-1
ttGradient = <unnamed> {
}
SetInboxItem = <function> defined =[C]:-1
SetBuybackItem = <function> defined =[C]:-1
shoppingTooltips = <table> {
}
SetMerchantItem = <function> defined =[C]:-1
SetQuestLogItem = <function> defined =[C]:-1
BottomOverlay = <unnamed> {
}
SetTradePlayerItem = <function> defined =[C]:-1
SetIconTextureAndText = <function> defined @Interface\AddOns\TipTacItemRef\ttItemRef.lua:62
SetSendMailItem = <function> defined =[C]:-1
FadeOut = <function> defined @Interface\AddOns\TipTac\ttCore.lua:853
updateTooltip = 0.110000
SetInventoryItem = <function> defined =[C]:-1
SetUnitBuff = <function> defined =[C]:-1
ttCount = <unnamed> {
}
SetLootRollItem = <function> defined =[C]:-1
SetUnitAura = <function> defined =[C]:-1
SetTradeTargetItem = <function> defined =[C]:-1
SetAuctionSellItem = <function> defined =[C]:-1
SetBagItem = <function> defined =[C]:-1
needsReset = true
SetRecipeReagentItem = <function> defined =[C]:-1
ttIcon = <unnamed> {
}
SetRecipeResultItem = <function> defined =[C]:-1
SetAuctionItem = <function> defined =[C]:-1
}
(*temporary) = "BOTTOMRIGHT"
(*temporary) = "UIParent"
(*temporary) = "BOTTOMRIGHT"
(*temporary) = -13
(*temporary) = 130

TipTac does not appear to be working correctly in 8.2.  The tooltips are still appearing and they are still in the correct locations where I put them, but they are blank.  I can briefly see the tooltip text and then it blanks out, almost as if the default tooltip is rendered and then TipTac's version overwrites it but is blank.  I'm getting no lua errors that I can see using BugGrabber/BugSack.

Update:  I noticed that there IS an error popping up but it doesn't specify TipTac at the top like usual.  However, TipTac is specified buried in the error information.  After I clear all errors, this error pops up as soon as I mouse over something and a tooltip appears that TipTac appears to try to modify:

7x FrameXML\GameTooltip.lua:154: Action[SetPoint] failed because[SetPoint would result in anchor family connection]: attempted from: GameTooltip:SetPoint.
[C]: in function `SetPoint'
FrameXML\GameTooltip.lua:154: in function <FrameXML\GameTooltip.lua:152>
[C]: ?
[C]: in function `GameTooltip_SetDefaultAnchor'
FrameXML\ActionButton.lua:822: in function `UpdateTooltip'
FrameXML\GameTooltip.lua:504: in function <FrameXML\GameTooltip.lua:483>
(tail call): ?
[C]: ?

Locals:
(*temporary) = GameTooltip {
0 = <userdata>
SetCurrencyByID = <function> defined =[C]:-1
progressBarPool = <table> {
}
SetHyperlink = <function> defined =[C]:-1
SetGuildBankItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
hasMoney = 1
SetOwner = <function> defined =[C]:-1
default = 1
SetQuestRewardSpell = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetQuestLogRewardSpell = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
LibExtraTipRight = <table> {
}
comparing = false
ItemTooltip = <unnamed> {
}
SetCurrencyToken = <function> defined =[C]:-1
TopOverlay = <unnamed> {
}
SetShapeshift = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetPetAction = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetUnitDebuff = <function> defined =[C]:-1
Show = <function> defined =[C]:-1
SetLootItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetQuestItem = <function> defined =[C]:-1
statusBarPool = <table> {
}
inherits = "GameFontNormalSmall"
ttGradient = <unnamed> {
}
numMoneyFrames = 1
FadeOut = <function> defined @TipTac\ttCore.lua:853
SetTrainerService = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetRecipeReagentItem = <function> defined =[C]:-1
SetBuybackItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
shoppingTooltips = <table> {
}
SetInboxItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
LibExtraTipLeft = <table> {
}
SetQuestLogItem = <function> defined =[C]:-1
SetMerchantItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
BottomOverlay = <unnamed> {
}
SetTalent = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetTradePlayerItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetIconTextureAndText = <function> defined @TipTacItemRef\ttItemRef.lua:62
SetSendMailItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetCurrencyTokenByID = <function> defined =[C]:-1
updateTooltip = 0.200000
SetInventoryItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetTradeTargetItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
ttCount = <unnamed> {
}
SetLootRollItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetUnitAura = <function> defined =[C]:-1
ttIcon = <unnamed> {
}
SetAuctionSellItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetBagItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
needsReset = true
SetUnitBuff = <function> defined =[C]:-1
__tamedCounts = false
SetAuctionItem = <function> defined @Auc-Advanced\Libs\LibExtraTip\LibExtraTip.lua:402
SetRecipeResultItem = <function> defined =[C]:-1
}
(*temporary) = "BOTTOMRIGHT"
(*temporary) = "UIParent"
(*temporary) = "BOTTOMRIGHT"
(*temporary) = -96.999969
(*temporary) = 130

In reply to GnuclearGnome:

 I'm getting the same thing. The tooltip appears briefly but if I keep my mouse there more than a second, the tooltip goes blank.

In reply to GnuclearGnome:

 I am having this exact same problem. Are you using Bartender 4 by chance?

In reply to Azarias59:

 Same issue and yes, using Bartender 4 but my tooltip goes blank goes blank mostly when I'm in combat and not always.

In reply to Azarias59:

 No, I've never used Bartender.  And I've noticed that it isn't consistent.  As in some tooltips always seem to blank out and some don't and others sometimes do and other times don't.  One that seems to always blank out on me is the Flight Master's Whistle.

The Z-Perl addon blocking to show/work the TipTac option "Show Item Tips with Quality Colored Border".

Can you check or fix this issue please?

I reckon that's TipTac's doing:

When using TipTac with GottaGoFast (or other M+ timer addons) to display mob count in the tooltip, Tiptac only shows the count for 1 second in the tooltip and then refreshes instantly and hides the count.

hovering over a mob: https://i.imgur.com/5kAwKuq.png

a second later: https://i.imgur.com/d2A6mJj.png

This does not happen when "Enable TipTac Unit Tip Appearance" is disabled.

In reply to Aezay:

 Works, thank you!

It's still not showing mouseover tooltips with shift+click from chat window (comparison tooltip), the frames are just blank with no text, only icons.