Every time I cast fishing from the spellbook I get the following error:

8x ATT-Classic/ATT-Classic.lua:684: attempt to index local 'group' (a nil value)
[string "@ATT-Classic/ATT-Classic.lua"]:684: in function <ATT-Classic/ATT-Classic.lua:683>
[string "@ATT-Classic/ATT-Classic.lua"]:688: in function <ATT-Classic/ATT-Classic.lua:683>
[string "@ATT-Classic/ATT-Classic.lua"]:718: in function <ATT-Classic/ATT-Classic.lua:683>
[string "@ATT-Classic/ATT-Classic.lua"]:1962: in function <ATT-Classic/ATT-Classic.lua:1704>
[string "@ATT-Classic/ATT-Classic.lua"]:3153: in function <ATT-Classic/ATT-Classic.lua:3152>
[string "@ATT-Classic/ATT-Classic.lua"]:3245: in function <ATT-Classic/ATT-Classic.lua:3155>
[string "=[C]"]: ?
[string "=[C]"]: ?
[string "=[C]"]: ?
[string "=[C]"]: ?
[string "=[C]"]: in function SetSpellBookItem' [string "@FrameXML/SpellBookFrame.lua"]:335: in function SpellButton_OnEnter'
[string "*SpellBookFrame.xml:184_OnEnter"]:1: in function <[string "*SpellBookFrame.xml:184_OnEnter"]:1>

Locals:
group = nil
l = 5
skip = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index local 'group' (a nil value)"
app =

{
CreatePetType = defined @ATT-Classic/src/base.lua:525
indexOf = defined @ATT-Classic/lib/Table.lua:37
SetDataMember = defined @ATT-Classic/ATT-Classic.lua:205
CreateLootThreshold = defined @ATT-Classic/src/base.lua:525
SpellNameToSpellID = {
}
ShowItemCompareTooltips = defined @ATT-Classic/ATT-Classic.lua:3273
CreateAchievementCriteria = defined @ATT-Classic/src/base.lua:525
Race = "BloodElf"
Sort = defined @ATT-Classic/lib/Sort.lua:232
PlayCompleteSound = defined @ATT-Classic/lib/Audio.lua:46
CloneArray = defined @ATT-Classic/src/base.lua:188
FilterItemClass_RequireBinding = defined @ATT-Classic/ATT-Classic.lua:8347
CloneReference = defined @ATT-Classic/src/base.lua:202
SortGroupDelayed = defined @ATT-Classic/lib/Sort.lua:322
ItemBindFilter = defined @ATT-Classic/ATT-Classic.lua:8217
ShowPopupDialog = defined @ATT-Classic/src/base.lua:220
EmptyTable = {
}
IsComplete = defined @ATT-Classic/ATT-Classic.lua:768
SearchForField = defined @ATT-Classic/src/Cache.lua:346
RaceIndex = 10
Class = "PALADIN"
CreateAchievement = defined @ATT-Classic/src/base.lua:525
CreateMount = defined @ATT-Classic/src/base.lua:510
ShowPopupDialogWithEditBox = defined @ATT-Classic/src/base.lua:240
CreateCategory = defined @ATT-Classic/src/base.lua:525
lastProgressUpdateMessage = "A 1.5.5 4999 11732 Insane Mode"
UpdateWindows = defined @ATT-Classic/ATT-Classic.lua:10688
Windows = {
}
PresetRWPs = {
}
IsReady = true
CreateUnit = defined @ATT-Classic/src/base.lua:525
SortDefaults = {
}
CreateTitle = defined @ATT-Classic/src/base.lua:510
CurrentMapID = 125
FilterItemTrackable = defined @ATT-Classic/ATT-Classic.lua:8381
CurrentCharacter = {
}
GetBestObjectIDForName = defined @ATT-Classic/src/Root.lua:25
GetFactionIDByName = defined @ATT-Classic/ATT-Classic.lua:5533
FilterItemPvP = defined @ATT-Classic/ATT-Classic.lua:8264
EventHandlers = {
}
GetFactionStandingThresholdFromString = defined @ATT-Classic/ATT-Classic.lua:5552
events = {
}
CreateSelfieFilter = defined @ATT-Classic/ATT-Classic.lua:6957
ShowSoftReservesForItem = defined @ATT-Classic/src/UI/Soft Reserves.lua:383
CreateLootMethod = defined @ATT-Classic/src/base.lua:525
GetProgressTextDefault = defined @ATT-Classic/ATT-Classic.lua:548
Categories = {
}
CloneDictionary = defined @ATT-Classic/src/base.lua:195
CommonAchievementHandlers = {
}
ToggleMainList = defined @ATT-Classic/ATT-Classic.lua:12023
CreateMinimapButton = defined @ATT-Classic/ATT-Classic.lua:9129
CreateMiniListForGroup = defined @ATT-Classic/ATT-Classic.lua:11887
print = defined @ATT-Classic/ATT-Classic.lua:477
CacheFlightPathData = defined @ATT-Classic/ATT-Classic.lua:5671
BuildSearchResponseForField = <functio