Describe the bug

The following lua error happens every single time I interact with an npc for the AutoTurnIn feature.

Date: 2024-05-05 11:06:23
ID: 2
Error occured in: Global
Count: 1
Message: Interface/AddOns/SpartanUI/modules/AutoTurnIn.lua line 507:
attempt to call global 'SelectGossipAvailableQuest' (a nil value)
Debug:
[string "=[C]"]: SelectGossipAvailableQuest()
[string "@Interface/AddOns/SpartanUI/modules/AutoTurnIn.lua"]:507: VarArgForAvailableQuests()
[string "@Interface/AddOns/SpartanUI/modules/AutoTurnIn.lua"]:635: ?()
[string "@Interface/AddOns/SpartanUI/modules/AutoTurnIn.lua"]:698:
Interface/AddOns/SpartanUI/modules/AutoTurnIn.lua:686
Locals:
(*temporary) = defined =[C]:-1

AddOns:
Swatter, v3.4.6977 (SwimmingSeadragon)
Auctionator, v10.2.37
BagBrother, v
Bagnon, v10.0.16
Bartender4, v4.14.16
BetterAlign, v
Bistooltip, v7.36
BuyEmAllClassic, v1.0.2
Cleanup, vv3.0.1
DBMCore, v10.2.36
DBMSoundEventsPack, v1.6.30
DBMStatusBarTimers, v10.2.36
DBMVPVEM, v6e983e1
Decursive, v2.7.18
Details, v#Details.20240503.12699.156
DetailsCompare2, v
DetailsEncounterDetails, v
DetailsRaidCheck, v
DetailsStreamer, v
DetailsTinyThreat, v
DetailsVanguard, v
Gargul, v7.4.10
GatherMate2, v1.47.5-classic
ItemTooltipProfessionIcons, vv1.3.1-Wrath
LeatrixMaps, v3.0.191
LeatrixPlus, v3.0.191
Mapster, v1.10.8
Postal, vv4.1.4
Quartz, v3.7.9
ReforgeLite, vv1.2.4
SexyMap, vv10.2.7
SimpleRaidTargetIcons, v2.2.4
SortBags, vv3.1.7
SpartanUI, v6.2.10-Classic
SpellActivationOverlay, v1.3.1
Stubby, v3.4.6920 (SwimmingSeadragon)
TidyPlatesThreatPlates, v11.2.6
TomTom, vv3.6.1-release
WeakAuras, v5.12.9
WeakAurasArchive, v5.12.9
WeakAurasCompanion, v5.2.3
XLoot, v10.1-2b
XLootFrame, v10.1-2b
XLootGroup, v10.1-2b
XLootMaster, v10.1-2b
XLootMonitor, v10.1-2b
XLootOptions, v10.1-2b
ZPerl, v7.2.4
ZPerlArcaneBar, v
ZPerlCustomHighlight, v
ZPerlParty, v
ZPerlPlayer, v
ZPerlPlayerBuffs, v
ZPerlPlayerPet, v
ZPerlRaidAdmin, v
ZPerlRaidFrames, v
ZPerlRaidHelper, v
ZPerlRaidMonitor, v
ZPerlTarget, v
ZPerlTargetTarget, v
BlizRuntimeLib v4.4.0.54525(US)
(ck=5c3)

To Reproduce
Steps to reproduce the behavior:

1. Install version 6.2.10-Classic for Cataclysm Classic WoW
2. Interact with an NPC such as the auction house npc, or a quest giver npc
3. Watch as error shows up for the AutoTurnIn feature
4. See error

Screenshots
If applicable, add screenshots to help explain your problem.

Game details:

Cataclysm Classic

- Disabled Modules: none

Additional context
none