1x Interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:33: attempt to call method 'Load' (a nil value)
[string "@interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua"]:33: in function `LoadWithBlizzard_AchievementUI'
[string "@interface\AddOns\Krowi_AchievementFilter\Krowi_AchievementFilter-48.2.lua"]:80: in function <...\Krowi_AchievementFilter\Krowi_AchievementFilter.lua:77>
[string "@interface\AddOns\Krowi_AchievementFilter\Krowi_AchievementFilter-48.2.lua"]:122: in function <...\Krowi_AchievementFilter\Krowi_AchievementFilter.lua:111>

Locals:
self =

{
HookShowSubFrame = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:74
CategoriesFrame = KrowiAF_CategoriesFrame {
}
SetAchievementFrameHeight = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:141
HookBaseTabOnClick = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:80
PrepareTabsOrder = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:291
RefreshView = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:452
SummaryFrame = KrowiAF_AchievementFrameSummaryFrame {
}
AlertSystem = {
}
ShowStatusBarTooltip = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:301
LoadOldAchievementFrameTabsCompatibility = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:426
SetCloseButtonOnKeyDown = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:116
LoadWithAddon = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:11
Tabs = {
}
AchievementsObjectives = KrowiAF_AchievementsObjectives {
}
ResetAchievementWindowPosition = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:107
ShowSubFrame = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:93
SideButton = {
}
FilterButton = KrowiAF_AchievementFrameFilterButton {
}
Calendar = {
}
SetFrameToLastPosition = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:436
SetAchievementFrameWidth = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:131
Search = {
}
RightClickMenu = {
}
AchievementsFrame = KrowiAF_AchievementsFrame {
}
LoadOldAchievementFrameCompatibility = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:409
TabsOrderGetActiveKeys = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:326
AchievementTooltip = {
}
AchievementFrameTabButton = {
}
AddDataToBlizzardTabs = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:277
GetSafeScrollChildBottom = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:155
AchievementFrameHeader = {
}
DataManagerFrame = KrowiAF_DataManagerFrame {
}
WorldMapButton = Krowi_WorldMapButtons1 {
}
SelectTab = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:183
LoadWrathClassicAchievementFrameChanges = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:394
LoadWithBlizzard_AchievementUI = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:22
SubFrames = {
}
ResetAchievementFrameHeight = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:148
ShowHideTabs = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:232
ToggleAchievementFrame = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:194
GameTooltipProgressBar = Krowi_ProgressBar1 {
}
ResetAchievementFrameWidth = defined @interface\AddOns\Krowi_AchievementFilter\GUI\GUI.lua:135
SideButtonSystem = {
}
}
(*temporary) = nil
(*temporary) = KrowiAF_AchievementsObjectives {
0 =
DisplayCriteria = defined @interface\AddOns\Krowi_AchievementFilter\GUI\AchievementButton\AchievementsObjectivesMixin.lua:313
ResetProgressBars = defined @interface\AddOns\Krowi_AchievementFilter\GUI\AchievementButton\AchievementsObjectivesMixin.lua:18
SetTextPoints = defined @interface\AddOns\Krowi_AchievementFilter\GUI\AchievementButton\AchievementsObjectivesMixin.lua:262
ResetAll = defined @interface\AddOns\Krowi_AchievementFilter\GUI\AchievementButton\AchievementsObjectivesMixin.lua:33
ResetMiniAchievements = defined @interface\AddOns\Krowi_AchievementFilter\GUI\AchievementButton\AchievementsObjectivesMixin.lua:22
ResetTextCriteria = defined @interface\AddOns\Krowi_AchievementF

I'm not able to reproduce this issue. Please provide a detailed list of steps what I should do.

Additional info to add is:

1. Other addons that are needed to cause this issue.

@gelsbern please provide more info here as well if you have.