What steps will reproduce the problem?

1. Login to any character in Classic Era

What version of ShestakUI are you using? (Stating 'latest' is not useful)

2.1.4

Do you have an error log of what happened?

14448x ShestakUI/Core/Classic.lua:17: attempt to compare number with string
[string "@ShestakUI/Core/Classic.lua"]:17: in function `GetSpecialization'
[string "@ShestakUI/Modules/Auras/SelfBuffsReminder.lua"]:15: in function <ShestakUI/Modules/Auras/SelfBuffsReminder.lua:12>

Locals:
isInspect = nil
isPet = nil
specGroup = nil
specIndex = nil
max = 0
(for index) = 1
(for limit) = 3
(for step) = 1
tabIndex = 1
spent = ""
(*temporary) = 3
(*temporary) = 81
(*temporary) = "Arcane"
(*temporary) = ""
(*temporary) = 135932
(*temporary) = "attempt to compare number with string"
T =

{
CalculateMoverPoints = defined @ShestakUI/Core/Functions.lua:210
class = "MAGE"
RaidBuffs = {
}
SkinExpandOrCollapse = defined @ShestakUI/Core/API.lua:1029
white_list = {
}
TBC = false
IsFramePositionedLeft = defined @ShestakUI/Core/Functions.lua:236
MoverFrames = {
}
PostUpdateRaidHealth = defined @ShestakUI/Modules/UnitFrames/Functions.lua:212
ShiftBarUpdate = defined @ShestakUI/Modules/ActionBars/Core.lua:546
merge = {
}
CheckPlayerBuff = defined @ShestakUI/Core/Functions.lua:144
UpdateManaLevel = defined @ShestakUI/Modules/UnitFrames/Functions.lua:438
SkinIconBorder = defined @ShestakUI/Core/API.lua:1132
ShortValue = defined @ShestakUI/Core/Functions.lua:15
CurrentProfile = defined @ShestakUI/Core/Functions.lua:248
HideAuraFrame = defined @ShestakUI/Modules/UnitFrames/Functions.lua:659
SkinDropDownBox = defined @ShestakUI/Core/API.lua:726
GetSpecializationRole = defined @ShestakUI/Core/Classic.lua:39
BuffWhiteList = {
}
SkinFrame = defined @ShestakUI/Core/API.lua:1094
color = {
}
raid_spells = {
}
CreateAuraWatch = defined @ShestakUI/Modules/UnitFrames/Functions.lua:915
UpdateThreat = defined @ShestakUI/Modules/UnitFrames/Functions.lua:880
Hider = Frame {
}
healfilter = {
}
CreateAuraTimer = defined @ShestakUI/Modules/UnitFrames/Functions.lua:726
SkinFuncs = {
}
name = "Rakras"
oUF_colors = {
}
SkinTab = defined @ShestakUI/Core/API.lua:545
BuffBlackList = {
}
SkinRotateButton = defined @ShestakUI/Core/API.lua:686
ArenaControl = {
}
SkinScrollBar = defined @ShestakUI/Core/API.lua:426
race = "Gnome"
PostUpdateRaidHealthColor = defined @ShestakUI/Modules/UnitFrames/Functions.lua:190
ReminderCasterBuffs = defined @ShestakUI/Config/Filters_Vanilla/Reminders.lua:174
DebuffWhiteList = {
}
client = "enUS"
enemy_spells = {
}
Hardcore = false
SoD = true
RaidDebuffs = {
}
SkinIconSelectionFrame = defined @ShestakUI/Core/API.lua:909
IsHealerSpec = defined @ShestakUI/Core/Functions.lua:129
UTF = defined @ShestakUI/Core/Functions.lua:178
StyleShift = defined @ShestakUI/Modules/ActionBars/Style.lua:263
SkinCheckBox = defined @ShestakUI/Core/API.lua:759
SkinCheckBoxAtlas = defined @ShestakUI/Core/API.lua:796
RaidDebuffsReverse = {
}
SetFontString = defined @ShestakUI/Modules/UnitFrames/Functions.lua:45
Scale = defined @ShestakUI/Core/PixelPerfect.lua:28
PostCreateButton = defined @ShestakUI/Modules/UnitFrames/Functions.lua:679
oUF = {
}
SkinHelpBox = defined @ShestakUI/Core/API.lua:1083
level = 50
ColorPlate = {
}
Classic = true
CustomFilterBoss = defined @ShestakUI/Modules/UnitFrames/Functions.lua:806
PostUpdateButton = defined @ShestakUI/Modules/UnitFrames/Functions.lua:757

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)

Nothing visibly wrong with the UI just continuous chat spam as it adds another error every .5 seconds