1x DBM-Core/DBM-Core.lua:7209: attempt to concatenate local 'currentMapID' (a nil value)
[string "@DBM-Core/DBM-Core.lua"]:7209: in function `handler'
[string "@DBM-Core/DBM-Core.lua"]:1140: in function <DBM-Core/DBM-Core.lua:1127>

Locals:
self =

{
SelectGossip = defined @DBM-Core/DBM-Core.lua:2972
GetUnitIdFromCID = defined @DBM-Core/DBM-Core.lua:2862
CHAT_MSG_ADDON_LOGGED = defined @DBM-Core/DBM-Core.lua:4796
IsRetail = defined @DBM-Core/DBM-Core.lua:7558
StopLogging = defined @DBM-Core/DBM-Core.lua:6073
FindScenarioIDs = defined @DBM-Core/DBM-Core.lua:7135
GetNumGuildPlayersInZone = defined @DBM-Core/DBM-Core.lua:2600
VibrateController = defined @DBM-Core/DBM-Core.lua:7101
FindDungeonMapIDs = defined @DBM-Core/DBM-Core.lua:7127
GetUnitIdFromGUID = defined @DBM-Core/DBM-Core.lua:2684
CopyProfile = defined @DBM-Core/DBM-Core.lua:2066
CHAT_MSG_MONSTER_EMOTE = defined @DBM-Core/DBM-Core.lua:5151
CHAT_MSG_WHISPER = defined @DBM-Core/DBM-Core.lua:6862
SendPVPTimers = defined @DBM-Core/DBM-Core.lua:6657
DeleteProfile = defined @DBM-Core/DBM-Core.lua:2083
DungeonMusic = {
}
ShowUpdateReminder = defined @DBM-Core/modules/UpdateReminder.lua:80
GetRaidRoster = defined @DBM-Core/DBM-Core.lua:2639
PLAYER_REGEN_DISABLED = defined @DBM-Core/DBM-Core.lua:4913
FireEvent = defined @DBM-Core/DBM-Core.lua:1974
CreateModLocalization = defined @DBM-Core/modules/objects/Localization.lua:99
SCENARIO_COMPLETED = defined @DBM-Core/DBM-Core.lua:3645
IsEnabled = defined @DBM-Core/DBM-Core.lua:6943
GetMyPlayerInfo = defined @DBM-Core/DBM-Core.lua:2707
ADDON_LOADED = defined @DBM-Core/DBM-Core.lua:1638
IconNumToTexture = defined @DBM-Core/DBM-Core.lua:7116
ReceiveVariableInfo = defined @DBM-Core/DBM-Core.lua:6607
registeredUnitEvents = {
}
BattleMusic = {
}
VoiceVersions = {
}
INSTANCE_GROUP_SIZE_CHANGED = defined @DBM-Core/DBM-Core.lua:2571
Voices = {
}
AddDefeatSound = defined @DBM-Core/modules/Sounds.lua:123
AddOns = {
}
SortByMeleeRoster = defined @DBM-Core/DBM-Core.lua:8050
Options = {
}
GetBossUnitId = defined @DBM-Core/DBM-Core.lua:2844
GetModLocalization = defined @DBM-Core/modules/objects/Localization.lua:116
AddDefaultOptions = defined @DBM-Core/DBM-Core.lua:2995
UPDATE_MOUSEOVER_UNIT = defined @DBM-Core/DBM-Core.lua:4005
ZONE_CHANGED_NEW_AREA = defined @DBM-Core/DBM-Core.lua:3850
CINEMATIC_START = defined @DBM-Core/DBM-Core.lua:7202
FilterRaidBossEmote = defined @DBM-Core/DBM-Core.lua:1473
RequestTimers = defined @DBM-Core/DBM-Core.lua:6554
GetMusic = defined @DBM-Core/modules/Sounds.lua:245
Music = {
}
SortByGroup = defined @DBM-Core/DBM-Core.lua:7999
GetBattleMusic = defined @DBM-Core/modules/Sounds.lua:211
RAID_BOSS_WHISPER = defined @DBM-Core/DBM-Core.lua:5173
UPDATE_BATTLEFIELD_STATUS = defined @DBM-Core/DBM-Core.lua:3623
GetDungeonMusic = defined @DBM-Core/modules/Sounds.lua:163
CheckNearby = defined @DBM-Core/DBM-Core.lua:2887
GetDefeatSounds = defined @DBM-Core/modules/Sounds.lua:116
CHAT_MSG_MON

From the other bug:

To Reproduce
Working on the United Again storyline
Accepted The Last Conflict quest in the chain.
Entered the Azure Vault instance. (First occurrence of error)
Finished Quest and exited instance (second occurrence of error)