WowAce

When trying to sort bank, the following error occurs.

1x Interface/AddOns/BankStack/core.lua:453: attempt to call global 'GetBankBagSlotFlag' (a nil value)
[string "@Interface/AddOns/BankStack/core.lua"]:453: in function `IsIgnored'
[string "@Interface/AddOns/BankStack/stack.lua"]:53: in function `Stack'
[string "@Interface/AddOns/BankStack/sort.lua"]:32: in function <Interface/AddOns/BankStack/sort.lua:12>
[string "@Interface/AddOns/BankStack/core.lua"]:503: in function `?'
[string "@Interface/FrameXML/ChatFrame.lua"]:5219: in function `ChatEdit_ParseText'
[string "@Interface/FrameXML/ChatFrame.lua"]:4883: in function `ChatEdit_SendText'
[string "@Interface/FrameXML/ChatFrame.lua"]:3127: in function <Interface/FrameXML/ChatFrame.lua:3120>
[string "=[C]"]: in function `UseAction'
[string "@Interface/FrameXML/SecureTemplates.lua"]:364: in function `handler'
[string "@Interface/FrameXML/SecureTemplates.lua"]:690: in function <Interface/FrameXML/SecureTemplates.lua:672>
[string "@Interface/FrameXML/SecureTemplates.lua"]:704: in function <Interface/FrameXML/SecureTemplates.lua:697>
[string "@Interface/FrameXML/SecureTemplates.lua"]:746: in function `SecureActionButton_OnClick'
[string "@Interface/FrameXML/ActionButton.lua"]:1151: in function <Interface/FrameXML/ActionButton.lua:1121>
[string "=[C]"]: ?

Locals:
bag = -3
slot = 1
(*temporary) = nil
(*temporary) = -7
(*temporary) = nil
(*temporary) = "attempt to call global 'GetBankBagSlotFlag' (a nil value)"
core = <table> {
PickupItem = <function> defined @Interface/AddOns/BankStack/core.lua:365
SetDefaultModuleLibraries = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:367
encode_move = <function> defined @Interface/AddOns/BankStack/core.lua:264
contains_bank_bag = <function> defined @Interface/AddOns/BankStack/core.lua:194
modules = <table> {
}
baseName = "BankStack"
all_bags_with_guild = <table> {
}
is_valid_bag = <function> defined @Interface/AddOns/BankStack/core.lua:142
bankrequired = true
StartStacking = <function> defined @Interface/AddOns/BankStack/core.lua:755
SortBags = <function> defined @Interface/AddOns/BankStack/sort.lua:12
CanItemGoInBag = <function> defined @Interface/AddOns/BankStack/core.lua:401
Compress = <function> defined @Interface/AddOns/BankStack/stack.lua:24
contains_guild_bank_bag = <function> defined @Interface/AddOns/BankStack/core.lua:199
SetDefaultModulePrototype = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:409
defaultModuleState = true
IsEnabled = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:451
IsSpecialtyBag = <function> defined @Interface/AddOns/BankStack/core.lua:388
DisableModule = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:350
has_guild_bank = <function> defined =[C]:-1
RegisterMessage = <function> defined @Interface/AddOns/AskMrRobot/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:116
UnregisterMessage = <function> defined @Interface/AddOns/AskMrRobot/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:179
GetNumSlots = <function> defined @Interface/AddOns/BankStack/core.lua:317
CommandDecorator = <function> defined @Interface/AddOns/BankStack/core.lua:460
is_bank_bag = <function> defined @Interface/AddOns/BankStack/core.lua:146
decode_move = <function> defined @Interface/AddOns/BankStack/core.lua:265
CheckTooltipFor = <function> defined @Interface/AddOns/BankStack/core.lua:225
player_bags = <table> {
}
SetEnabledState = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:424
enabledState = true
is_guild_bank_bag = <function> defined @Interface/AddOns/BankStack/core.lua:150
RegisterEvent = <function> defined @Interface/AddOns/AskMrRobot/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:116
IterateModules = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:437
events = <table> {
}
frame = Frame {
}
bag_stacks = <table> {
}
is_partial = <function> defined @Interface/AddOns/BankStack/stack.lua:17
decode_bagslot = <function> defined @Interface/AddOns/BankStack/core.lua:263
FillBags = <function> defined @Interface/AddOns/BankStack/fill.lua:14
OnInitialize = <function> defined @Interface/AddOns/BankStack/core.lua:21
NewModule = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:235
bank_open = true
db = <table> {
}
GetModule = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:210
check_for_banks = <function> defined @Interface/AddOns/BankStack/core.lua:205
IsIgnored = <function> defined @Interface/AddOns/BankStack/core.lua:440
name = "BankStack"
defaultModuleLibraries = <table> {
}
setup_config = <function> defined @Interface/AddOns/BankStack/config.lua:291
encode_bagslot = <function> defined @Interface/AddOns/BankStack/core.lua:262
Fill = <function> defined @Interface/AddOns/BankStack/fill.lua:34
Squash = <function> defined @Interface/AddOns/BankStack/fill.lua:91
options = <table> {
}
Sort = <function> defined @Interface/AddOns/BankStack/sort.lua:283
StackSummary = <function> defined @Interface/AddOns/BankStack/stack.lua:102
Stack = <function> defined @Interface/AddOns/BankStack/stack.lua:40
GetName = <function> defined @Interface/AddOns/BankStack/lib/AceAddon-3.0/AceAddon-3.0.lua:279
RegisterCallback = <function> defin