When first loading the game and opening the bag, as soon as you hover over an item in your bag, this error appears.
I use the curseforge app to install and have the latest version on WOTLK Classic.

Date: 2023-05-16 07:31:59
ID: 1
Error occured in: Global
Count: 1
Message: Interface/FrameXML/ContainerFrame_Shared.lua line 1327:
Action[SetPoint] failed because[SetPoint would result in anchor family connection]: attempted from: GameTooltip:SetPoint.
Debug:
[string "=(tail call)"]: ?
[string "=[C]"]: ?
[string "=[C]"]: SetPoint()
[string "@Interface/FrameXML/ContainerFrame_Shared.lua"]:1327: ContainerFrameItemButton_CalculateItemTooltipAnchors()
[string "@Interface/FrameXML/ContainerFrame_Shared.lua"]:1373: ContainerFrameItemButton_OnEnter()
[string "@Interface/AddOns/BagBrother/addons/core/classes/item.lua"]:359: ShowTooltip()
[string "@Interface/AddOns/BagBrother/addons/core/classes/item.lua"]:186:
...rface/AddOns/BagBrother/addons/core/classes/item.lua:182
Locals:
(*temporary) = true
(*temporary) = defined =[C]:-1

AddOns:
Swatter, v3.4.6921 (SwimmingSeadragon)
AtlasLootClassic, vv3.1.2
AtlasLootClassicData, vv3.1.2
AtlasLootClassicDungeonsAndRaids, vv3.1.2
AucAdvanced, v3.4.6931 (SwimmingSeadragon)
AucFilterBasic, v3.4.6941 (SwimmingSeadragon)
AucScanData, v3.4.6908 (SwimmingSeadragon)
AucStatHistogram, v3.4.6928 (SwimmingSeadragon)
AucStatiLevel, v3.4.6913 (SwimmingSeadragon)
AucStatPurchased, v3.4.6910 (SwimmingSeadragon)
AucStatSimple, v3.4.6911 (SwimmingSeadragon)
AucStatStdDev, v3.4.6912 (SwimmingSeadragon)
AucUtilFixAH, v3.4.6914 (SwimmingSeadragon)
BagBrother, v
Bagnon, v10.0.16
Bartender4, v4.14.9
BeanCounter, v3.4.6933 (SwimmingSeadragon)
BetterFishing, v1.1.12
DugisGuideViewerZ, v3.031
Enchantrix, v3.4.6942 (SwimmingSeadragon)
EnchantrixBarker, v3.4.6917 (SwimmingSeadragon)
GatherMate2, v1.47-classic
GatherMate2HideNodes, v30400 1r33
Informant, v3.4.6934 (SwimmingSeadragon)
MinimapButtonButton, v1.17
SlideBar, v3.4.6919 (SwimmingSeadragon)
SpeedyAutoLoot, v2.2.11
Stubby, v3.4.6920 (SwimmingSeadragon)
TitanClassic, v1.5.7.30401
TitanClassicAmmo, v1.5.7.30401
TitanClassicBag, v1.5.7.30401
TitanClassicClock, v1.5.7.30401
TitanClassicGold, v1.5.7.30401
TitanClassicLocation, v1.5.7.30401
TitanClassicLootType, v1.5.7.30401
TitanClassicPerformance, v1.5.7.30401
TitanClassicRegen, v1.5.7.30401
TitanClassicRepair, v1.5.7.30401
TitanClassicVolume, v1.5.7.30401
TitanClassicXP, v1.5.7.30401
TooltipMouseOver, v
TradeSkillMaster, vv4.12.37
TradeSkillMasterAppHelper, vv4.12.2
VendorPrice, v1.6.5
BlizRuntimeLib_enUS v3.4.1.30401
(ck=65c)