user:/AddOns/LibDebugLogger/LibDebugLogger.lua:108: attempt to index a nil value
stack traceback:
user:/AddOns/LibDebugLogger/LibDebugLogger.lua:108: in function 'FormatTime'
<Locals> timestamp = 1564319934417 </Locals>
user:/AddOns/LibDebugLogger/LibDebugLogger.lua:401: in function '(main chunk)'
<Locals> LIB_IDENTIFIER = "LibDebugLogger", lib = tbl, TAG_INGAME = "UI", LOG_LEVEL_DEBUG = "D", LOG_LEVEL_INFO = "I", LOG_LEVEL_WARNING = "W", LOG_LEVEL_ERROR = "E", NUM_MAX_ENTRIES = 10000, LOG_PRUNE_THRESHOLD = 11000, MAX_ENTRY_AGE = 86400000, MAX_SAVE_DATA_LENGTH = 1999, ENTRY_TIME_INDEX = 1, ENTRY_FORMATTED_TIME_INDEX = 2, ENTRY_OCCURENCES_INDEX = 3, ENTRY_LEVEL_INDEX = 4, ENTRY_TAG_INDEX = 5, ENTRY_MESSAGE_INDEX = 6, ENTRY_STACK_INDEX = 7, STARTUP_LOG_TRACES = true, STARTUP_LOG_LEVEL = "D" </Locals>

user:/AddOns/LibDateTime/LibDateTime.lua:106: operator + is not supported for number + nil
stack traceback:
user:/AddOns/LibDateTime/LibDateTime.lua:106: in function 'lib:CombineIsoWeekAndYear'
<Locals> self = tbl, year = 2019 </Locals>
user:/AddOns/LibDateTime/LibDateTime.lua:144: in function 'lib:GetTraderWeek'
<Locals> self = tbl, weekOffset = 0, _ = 1564340100, endTime = 1564340400, startTime = 1563735600, isoWeekTime = 1563908400, year = 2019 </Locals>
user:/AddOns/AwesomeGuildStore/guildstorelist/OwnerList.lua:85: in function 'OwnerList:GetCurrentWeek'
<Locals> self = tbl </Locals>
user:/AddOns/AwesomeGuildStore/guildstorelist/OwnerList.lua:59: in function 'OwnerList:Initialize'
<Locals> self = tbl, saveData = tbl, guildIdMapping = tbl, weekOrder = tbl </Locals>
user:/AddOns/AwesomeGuildStore/guildstorelist/OwnerList.lua:10: in function 'OwnerList:New'
<Locals> self = tbl, object = tbl </Locals>
user:/AddOns/AwesomeGuildStore/guildstorelist/GuildStoreList.lua:601: in function 'InitializeGuildStoreList'
<Locals> globalSaveData = tbl, KioskData = tbl, StoreData = tbl, saveData = tbl, lang = "en", guildIdMapping = tbl </Locals>
user:/AddOns/AwesomeGuildStore/StartUp.lua:247: in function 'callback'
<Locals> saveData = tbl </Locals>
user:/AddOns/AwesomeGuildStore/StartUp.lua:47: in function '(anonymous)'
<Locals> event = 65536, name = "AwesomeGuildStore" </Locals>