I redownloaded and reinstalled this addon a few times. I get this error when i log in:

Date: 2021-05-19 21:03:54
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\Questie\Modules\QuestieMenu.lua line 516:
attempt to index field 'petFoodVendorTypes' (a nil value)
Debug:
[C]: ?
Questie\Modules\QuestieMenu.lua:516: UpdatePetFood()
Questie\Modules\QuestieMenu.lua:543: UpdatePlayerVendors()
Questie\Modules\QuestieMenu.lua:509: PopulateTownsfolkPostBoot()
...rface\AddOns\Questie\Modules\QuestieEventHandler.lua:173:
...rface\AddOns\Questie\Modules\QuestieEventHandler.lua:161
Locals:

AddOns:
Swatter, v8.2.6377 (SwimmingSeadragon)
Atlas, vv1.47.03.11304.00
AtlasClassicWoW, vv1.48.00
AucAdvanced, v8.2.6430 (SwimmingSeadragon)
AucFilterBasic, v8.2.6364 (SwimmingSeadragon)
AucStatHistogram, v8.2.6366 (SwimmingSeadragon)
AucStatiLevel, v8.2.6370 (SwimmingSeadragon)
AucStatPurchased, v8.2.6367 (SwimmingSeadragon)
AucStatSimple, v8.2.6399 (SwimmingSeadragon)
AucStatStdDev, v8.2.6369 (SwimmingSeadragon)
AucUtilFixAH, v8.2.6371 (SwimmingSeadragon)
BeanCounter, v8.2.6434 (SwimmingSeadragon)
DBMCore, v1.13.72
DBMDefaultSkin, v
DBMStatusBarTimers, v
Enchantrix, v8.2.6428 (SwimmingSeadragon)
EnchantrixBarker, v8.2.6469 (SwimmingSeadragon)
HandyNotes, vv1.6.3
Informant, v8.2.6374 (SwimmingSeadragon)
Questie, v6.3.11
Recount, vv1.13.6d
SilverDragon, vv11302.0
SilverDragonClassic, vv11302.0
SlideBar, v8.2.6375 (SwimmingSeadragon)
Stubby, v8.2.6376 (SwimmingSeadragon)
TitanClassic, v1.2.8.11306
TitanClassicAmmo, v1.2.8.11306
TitanClassicBag, v1.2.8.11306
TitanClassicClock, v1.2.8.11306
TitanClassicGold, v1.2.8.11306
TitanClassicLocation, v1.2.8.11306
TitanClassicLootType, v1.2.8.11306
TitanClassicPerformance, v1.2.8.11306
TitanClassicRegen, v1.2.8.11306
TitanClassicRepair, v1.2.8.11306
TitanClassicVolume, v1.2.8.11306
TitanClassicXP, v1.2.8.11306
TomTom, vv11306-1.2.0
TradeSkillMaster, vv4.10.37
TradeSkillMasterAppHelper, vv4.0.14
BlizRuntimeLib_enUS v1.13.7.11307
(ck=5c0)

Downloaded v6.3.11 - Universal (Era). This is on Windows 10 20H2.

Also when i first left click the minimap icon:

Date: 2021-05-19 21:13:32
ID: 2
Error occured in: Global
Count: 1
Message: ..\AddOns\Questie\Modules\QuestieMenu.lua line 200:
bad argument #1 to 'pairs' (table expected, got nil)
Debug:
[C]: ?
[C]: pairs()
Questie\Modules\QuestieMenu.lua:200: Show()
...uestie\Modules\Options\QuestieOptionsMinimapIcon.lua:41: OnClick()
...AddOns\DBM-Core\Libs\LibDBIcon-1.0\LibDBIcon-1.0.lua:144:
...AddOns\DBM-Core\Libs\LibDBIcon-1.0\LibDBIcon-1.0.lua:142
Locals:

AddOns:
Swatter, v8.2.6377 (SwimmingSeadragon)
Atlas, vv1.47.03.11304.00
AtlasClassicWoW, vv1.48.00
AucAdvanced, v8.2.6430 (SwimmingSeadragon)
AucFilterBasic, v8.2.6364 (SwimmingSeadragon)
AucStatHistogram, v8.2.6366 (SwimmingSeadragon)
AucStatiLevel, v8.2.6370 (SwimmingSeadragon)
AucStatPurchased, v8.2.6367 (SwimmingSeadragon)
AucStatSimple, v8.2.6399 (SwimmingSeadragon)
AucStatStdDev, v8.2.6369 (SwimmingSeadragon)
AucUtilFixAH, v8.2.6371 (SwimmingSeadragon)
BeanCounter, v8.2.6434 (SwimmingSeadragon)
DBMCore, v1.13.72
DBMDefaultSkin, v
DBMStatusBarTimers, v
Enchantrix, v8.2.6428 (SwimmingSeadragon)
EnchantrixBarker, v8.2.6469 (SwimmingSeadragon)
HandyNotes, vv1.6.3
Informant, v8.2.6374 (SwimmingSeadragon)
Questie, v6.3.11
Recount, vv1.13.6d
SilverDragon, vv11302.0
SilverDragonClassic, vv11302.0
SlideBar, v8.2.6375 (SwimmingSeadragon)
Stubby, v8.2.6376 (SwimmingSeadragon)
TitanClassic, v1.2.8.11306
TitanClassicAmmo, v1.2.8.11306
TitanClassicBag, v1.2.8.11306
TitanClassicClock, v1.2.8.11306
TitanClassicGold, v1.2.8.11306
TitanClassicLocation, v1.2.8.11306
TitanClassicLootType, v1.2.8.11306
TitanClassicPerformance, v1.2.8.11306
TitanClassicRegen, v1.2.8.11306
TitanClassicRepair, v1.2.8.11306
TitanClassicVolume, v1.2.8.11306
TitanClassicXP, v1.2.8.11306
TomTom, vv11306-1.2.0
TradeSkillMaster, vv4.10.37
TradeSkillMasterAppHelper, vv4.0.14
BlizRuntimeLib_enUS v1.13.7.11307
(ck=5c0)

One more: my quest tracker isn't working even though it's enabled in the quest log and Questie. I have to shift click the quest in the log to get it to show up.

Date: 2021-05-19 21:41:44
ID: 3
Error occured in: Global
Count: 1
Message: ...ce\AddOns\Questie\Modules\Tracker\QuestieTracker.lua line 1110:
attempt to index field 'activeQuestsHeader' (a nil value)
Debug:
(tail call): ?
...ce\AddOns\Questie\Modules\Tracker\QuestieTracker.lua:1110: ResetLocation()
...Modules\Options\TrackerTab\QuestieOptionsTracker.lua:639:
...Modules\Options\TrackerTab\QuestieOptionsTracker.lua:638
[C]: ?
...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:51:
...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:49
...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:847:
...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:668
[C]: ?
...nterface\AddOns\Atlas\Libs\AceGUI-3.0\AceGUI-3.0.lua:72:
...nterface\AddOns\Atlas\Libs\AceGUI-3.0\AceGUI-3.0.lua:70
...nterface\AddOns\Atlas\Libs\AceGUI-3.0\AceGUI-3.0.lua:306: Fire()
...tlas\Libs\AceGUI-3.0\widgets\AceGUIWidget-Button.lua:22:
...tlas\Libs\AceGUI-3.0\widgets\AceGUIWidget-Button.lua:19
Locals:
None
AddOns:
Swatter, v8.2.6377 (SwimmingSeadragon)
Atlas, vv1.47.03.11304.00
AtlasClassicWoW, vv1.48.00
AucAdvanced, v8.2.6430 (SwimmingSeadragon)
AucFilterBasic, v8.2.6364 (SwimmingSeadragon)
AucScanData, v8.2.6365 (SwimmingSeadragon)
AucStatHistogram, v8.2.6366 (SwimmingSeadragon)
AucStatiLevel, v8.2.6370 (SwimmingSeadragon)
AucStatPurchased, v8.2.6367 (SwimmingSeadragon)
AucStatSimple, v8.2.6399 (SwimmingSeadragon)
AucStatStdDev, v8.2.6369 (SwimmingSeadragon)
AucUtilFixAH, v8.2.6371 (SwimmingSeadragon)
BeanCounter, v8.2.6434 (SwimmingSeadragon)
DBMCore, v1.13.72
DBMDefaultSkin, v
DBMStatusBarTimers, v
Enchantrix, v8.2.6428 (SwimmingSeadragon)
EnchantrixBarker, v8.2.6469 (SwimmingSeadragon)
HandyNotes, vv1.6.3
Informant, v8.2.6374 (SwimmingSeadragon)
Questie, v6.3.11
Recount, vv1.13.6d
SilverDragon, vv11302.0
SilverDragonClassic, vv11302.0
SlideBar, v8.2.6375 (SwimmingSeadragon)
Stubby, v8.2.6376 (SwimmingSeadragon)
TitanClassic, v1.2.8.11306
TitanClassicAmmo, v1.2.8.11306
TitanClassicBag, v1.2.8.11306
TitanClassicClock, v1.2.8.11306
TitanClassicGold, v1.2.8.11306
TitanClassicLocation, v1.2.8.11306
TitanClassicLootType, v1.2.8.11306
TitanClassicPerformance, v1.2.8.11306
TitanClassicRegen, v1.2.8.11306
TitanClassicRepair, v1.2.8.11306
TitanClassicVolume, v1.2.8.11306
TitanClassicXP, v1.2.8.11306
TomTom, vv11306-1.2.0
TradeSkillMaster, vv4.10.37
TradeSkillMasterAppHelper, vv4.0.14
BlizRuntimeLib_enUS v1.13.7.11307
(ck=5ed)

@Mystarlite please update to v6.3.11 that will fix these errors