WowAce

I'm getting the error report below when opening my quest log. Then it seems when there are a lot of quests in the list (such as when I zoom out to Azeroth map), the list bugs entirely and is scattered across the page.

Date: 2018-09-22 08:52:18
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\AngryWorldQuests\QuestFrame.lua line 827:
attempt to compare nil with number
Debug:
AngryWorldQuests\QuestFrame.lua:827:
AngryWorldQuests\QuestFrame.lua:816
[C]: sort()
AngryWorldQuests\QuestFrame.lua:966:
AngryWorldQuests\QuestFrame.lua:847
[C]: QuestLogQuests_Update()
..\FrameXML\QuestMapFrame.lua:249: QuestMapFrame_UpdateAll()
..\FrameXML\QuestMapFrame.lua:331: QuestMapFrame_CloseQuestDetails()
...rface\AddOns\Blizzard_WorldMap\Blizzard_WorldMap.lua:220: OnMapChanged()
...ace\AddOns\Blizzard_MapCanvas\Blizzard_MapCanvas.lua:37: SetMapID()
...Ons\Blizzard_WorldMap\Blizzard_WorldMapTemplates.lua:224: GoToMap()
...Ons\Blizzard_WorldMap\Blizzard_WorldMapTemplates.lua:270: myclick()
..\FrameXML\NavigationBar.lua:180:
..\FrameXML\NavigationBar.lua:169
Locals:
a = <unnamed> {
0 = <userdata>
mapID = 1165
timeLeftMinutes = 0
rewardValue2 = 350
worldQuest = true
infoY = 0.72244173288345
rewardValue = 1553
rewardCategory = "CURRENCY"
TagText = <unnamed> {
}
questID = 54166
TagTexture = <unnamed> {
}
factionID = 2157
ButtonText = <unnamed> {
}
awq = true
numObjectives = 1
TimeIcon = <unnamed> {
}
Check = <unnamed> {
}
Text = <unnamed> {
}
TaskIcon = <unnamed> {
}
infoX = 0.56941318511963
}
b = <unnamed> {
0 = <userdata>
mapID = 863
timeLeftMinutes = 849
rewardValue2 = 350
layoutIndex = 27
worldQuest = true
infoY = 0.31991767883301
rewardValue = 1553
rewardCategory = "CURRENCY"
TagText = <unnamed> {
}
questID = 52799
TagTexture = <unnamed> {
}
factionID = 2156
ButtonText = <unnamed> {
}
awq = true
numObjectives = 1
TimeIcon = <unnamed> {
}
Check = <unnamed> {
}
Text = <unnamed> {
}
TaskIcon = <unnamed> {
}
infoX = 0.52427369356155
}
(*temporary) = nil
(*temporary) = 2
(*temporary) = 863
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to compare nil with number"
Config = <table> {
GetFilterDisabled = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:166
FilterKeyToMask = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:134
HasFilters = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:139
CharacterConfig = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:205
GetFilter = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:148
SetNoFilter = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:183
GetFilterTable = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:154
IsOnlyFilter = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:142
InitializeDropdown = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:35
Set = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:79
Startup = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:496
RegisterCallback = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:103
SetOnlyFilter = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:187
SetCharacterConfig = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:209
UnregisterCallback = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:121
BeforeStartup = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:465
SetFilter = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:172
CreatePanel = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:452
ToggleFilter = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:192
Get = <function> defined @Interface\AddOns\AngryWorldQuests\Config.lua:63
}
SORT_FACTION = 4
SORT_TIME = 2
SORT_ZONE = 3
MAPID_ORDER = <table> {
864 = 1
942 = 4
896 = 5
680 = 51
634 = 55
650 = 54
790 = 57
885 = 59
641 = 53
627 = 56
882 = 61
830 = 60
646 = 58
862 = 3
630 = 52
863 = 2
1169 = 7
895 = 6
}
SORT_REWARDS = 5
Mod = <table> {
FiltersOrder = <table> {
}
SortOrder = <table> {
}
Startup = <function> defined @Interface\AddOns\AngryWorldQuests\QuestFrame.lua:1118
AddFilter = <function> defined @Interface\AddOns\AngryWorldQuests\QuestFrame.lua:1020
BeforeStartup = <function> defined @Interface\AddOns\AngryWorldQuests\QuestFrame.lua:1056
AddCurrencyFilter = <function> defined @Interface\AddOns\AngryWorldQuests\QuestFrame.lua:1035
Blizzard_WorldMap = <function> defined @Interface\AddOns\AngryWorldQuests\QuestFrame.lua:1093
Filters = <table> {
}
}
REWARDS_ORDER = <table> {
ITEMS = 5
LOOT = 2
ARTIFACT_POWER = 1
CURRENCY = 3
GOLD = 4
}

AddOns:
Swatter, v8.0.6162 (SwimmingSeadragon)
AngryKeystones, v
AngryWorldQuests, v
AskMrRobot, v64
AucAdvanced, v8.0.6122 (SwimmingSeadragon)
AucFilterBasic, v8.0.6149 (SwimmingSeadragon)
AucStatHistogram, v8.0.6151 (SwimmingSeadragon)
AucStatiLevel, v8.0.6155 (SwimmingSeadragon)
AucStatPurchased, v8.0.6152 (SwimmingSeadragon)
AucStatSimple, v8.0.6153 (SwimmingSeadragon)
AucStatStdDev, v8.0.6154 (SwimmingSeadragon)
AucUtilFixAH, v8.0.6156 (SwimmingSeadragon)
AzeriteTooltip, v1.71
BeanCounter, v8.0.6157 (SwimmingSeadragon)
CantHealYou, v3.43
CoordsTracking, vv2.08
DBMCore, v8.0.10
DBMDefaultSkin, v
DBMStatusBarTimers, v
Enchantrix, v8.0.6158 (SwimmingSeadragon)
Informant, v8.0.6159 (SwimmingSeadragon)
MoveAnything, v17.0.0
PetBattleTeams, v3.3.10
PremadeGroupsFilter, v1.21
REPorter, v2.1.6
Scrap, v13.12
ScrapSpotlight, v13.12
Skada, v1.7.5
SlideBar, v8.0.6160 (SwimmingSeadragon)
Stubby, v8.0.6161 (SwimmingSeadragon)
TidyPlatesThreatPlates, v9.0.15
WeakAuras, v2.7.10
BlizRuntimeLib_enUS v8.0.1.80000 <none>
(ck=438)