Latest Version of TipTac and WoW.

1954x [string "return function() local local_env = aura_en..."]:68: attempt to index field 'game_tooltip' (a nil value)
[string "return function() local local_env = aura_env or {}"]:68: in function <[string "return function() local local_env = aura_en..."]:64>
[string "=[C]"]: in function GameTooltip_SetDefaultAnchor' [string "@FrameXML/GameTooltip.lua"]:954: in function SetWorldCursor'
[string "@FrameXML/UIParent.lua"]:1476: in function <FrameXML/UIParent.lua:1399>

Locals:
tooltip = GameTooltip {
0 =
SetQuestLogRewardSpell = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
ItemTooltip = Frame {
}
SetHyperlink = defined =[C]:-1
SetAzeriteEssence = defined =[C]:-1
SetVoidDepositItem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetTraitEntry = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
ClearBackdrop = defined @SharedXML/Backdrop.lua:282
SetLootCurrency = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetWorldCursor = defined @FrameXML/GameTooltip.lua:952
SetLootItem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
GetSpell = defined @FrameXML/GameTooltip.lua:990
SetQuestLogSpecialItem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetRecipeReagentItem = defined @Altoholic/Services/Tooltip.lua:616
SetMerchantItem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
BottomOverlay = Texture {
}
ttLastUpdate = 0
SetSocketedRelic = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
ProcessInfo = defined @SharedXML/Tooltip/TooltipDataHandler.lua:236
NineSlice = Frame {
}
OnLoad = defined @FrameXML/GameTooltip.lua:927
TopEdge = Texture {
}
SetUnitDebuffByAuraInstanceID = defined =[C]:-1
SetBagItem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetBackdropColor = defined @TipTac/ttCore.lua:1771
LeftEdge = Texture {
}
AddLineDataText = defined @SharedXML/Tooltip/TooltipDataHandler.lua:324
SetSpellBookItem = defined =[C]:-1
textLeft1Font = "GameTooltipHeaderText"
SetShapeshift = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
hasMoney = 1
ttDisplayingUnit = false
SetArtifactPowerByID = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
textRight2Font = "GameTooltipText"
TopOverlay = Texture {
}
SetSocketedItem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetUnitDebuff = defined =[C]:-1
SetMountBySpellID = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetBorderBlendMode = defined @SharedXML/Backdrop.lua:266
SetTrainerService = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
TextLeft1 = GameTooltipTextLeft1 {
}
SetAzeritePower = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetLFGDungeonShortageReward = defined =[C]:-1
OnBackdropSizeChanged = defined @SharedXML/Backdrop.lua:182
SetArtifactItem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
StatusBar = GameTooltipStatusBar {
}
SetPossession = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetUnitAura = defined =[C]:-1
SetUnitBuffByAuraInstanceID = defined =[C]:-1
SetConduit = defined =[C]:-1
SetupPieceVisuals = defined @SharedXML/Backdrop.lua:246
SetMinimapMouseover = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
GetItem = defined @FrameXML/GameTooltip.lua:986
SetRecipeResultItem = defined @Altoholic/Services/Tooltip.lua:616
SetQuestPartyProgress = defined =[C]:-1
ProcessLineData = defined @SharedXML/Tooltip/TooltipDataHandler.lua:303
OnBackdropLoaded = defined @SharedXML/Backdrop.lua:152
SetPvpTalent = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetExistingSocketGem = defined @SharedXML/Tooltip/TooltipDataHandler.lua:444
SetUnit = defined =[C]:-1
SetTotem = defined

This seems not related to TipTac. The field "game_tooltip" isn't used anywhere.

Perhaps you can give the latest release v23.01.23 a try.