When the addon loads, below. I see other addons listed as well; I'm not a programmer, but I'm sure you can figure it out. Note that this also happens with ChampionCommander. I can post those errors in that project, if you'd like:

185x OrderHallCommander/tutorials.lua:409: attempt to call upvalue 'HelpPlate_TooltipHide' (a nil value)
[OrderHallCommander/tutorials.lua]:409: in function 'Hide'
[OrderHallCommander/tutorials.lua]:485: in function <OrderHallCommander/tutorials.lua:470>
[tail call]: ?
[C]: ?
[BattlePetCompletionist/Libs/AceAddon-3.0-13/AceAddon-3.0.lua]:66: in function <...ePetCompletionist/Libs/AceAddon-3.0/AceAddon-3.0.lua:61>
[BattlePetCompletionist/Libs/AceAddon-3.0-13/AceAddon-3.0.lua]:494: in function 'InitializeAddon'
[BattlePetCompletionist/Libs/AceAddon-3.0-13/AceAddon-3.0.lua]:619: in function <...ePetCompletionist/Libs/AceAddon-3.0/AceAddon-3.0.lua:611>
[C]: ?
[C]: ?
[C]: in function 'LoadAddOn'
[WQAchievements/WQAchievements.lua]:233: in function <WQAchievements/WQAchievements.lua:156>
[C]: ?
...[Blizzard_UIParent/Mainline/UIParent.lua]:614: in function 'MajorFactions_LoadUI'
[Blizzard_ExpansionLandingPage/Blizzard_WarWithinLandingPage.lua]:96: in function 'SetUpMajorFactionList'
[Blizzard_ExpansionLandingPage/Blizzard_WarWithinLandingPage.lua]:89: in function 'RefreshMajorFactionList'
[Blizzard_ExpansionLandingPage/Blizzard_WarWithinLandingPage.lua]:84: in function 'RefreshOverlay'
[Blizzard_ExpansionLandingPage/Blizzard_WarWithinLandingPage.lua]:76: in function <...pansionLandingPage/Blizzard_WarWithinLandingPage.lua:72>
[C]: ?
[C]: in function 'CreateFrame'
[Blizzard_ExpansionLandingPage/Blizzard_WarWithinLandingPage.lua]:48: in function 'CreateOverlay'
[Blizzard_ExpansionLandingPage/Blizzard_ExpansionLandingPage.lua]:82: in function 'RefreshExpansionOverlay'
[Blizzard_ExpansionLandingPage/Blizzard_ExpansionLandingPage.lua]:37: in function <...pansionLandingPage/Blizzard_ExpansionLandingPage.lua:35>

Locals:
self =

{
modules = {
}
defaultModuleLibraries = {
}
baseName = "OrderHallCommander"
name = "OrderHallCommander_Tutorials"
orderedModules = {
}
defaultModuleState = true
enabledState = true
hooks = {
}
moduleName = "Tutorials"
}
this = nil
(*temporary) = nil
(*temporary) = "attempt to call upvalue 'HelpPlate_TooltipHide' (a nil value)"
HelpPlateTooltip = HelpPlateTooltip {
BG = Texture {
}
GlowLeft = Texture {
}
ArrowLeft = Texture {
}
GlowTop = Texture {
}
ShadowTop = Texture {
}
ArrowGlowDown = Texture {
}
ShadowTopLeft = Texture {
}
GlowTopLeft = Texture {
}
ArrowDown = Texture {
}
GlowBottomLeft = Texture {
}
GlowBottom = Texture {
}ArrowRight = Texture {
}
ArrowUp = Texture {
}
ArrowGlowRight = Texture {
}
ArrowGlowUp = Texture {
}
GlowRight = Texture {
}
ShadowLeft = Texture {
}
ShadowBottomLeft = Texture {
}
Text = FontString {
}
LingerAndFade = AnimationGroup {
}
ShadowTopRight = Texture {
}
ShadowBottom = Texture {
}
GlowTopRight = Texture {
}
ArrowGlowLeft = Texture {
}
ShadowBottomRight = Texture {
}
ShadowRight = Texture {
} GlowBottomRight = Texture {
}
}
platestrata = "MEDIUM"
HelpPlate_TooltipHide = nil
Clicker = Frame {
Close = Button {
}
Backward = Button {
}
Home = Button {
}
Forward = Button {
}}
Enhancer = Frame {
BG = Texture {
}
GlowLeft = Texture {
}
ShadowLeft = Texture {
}
ShadowBottomRight = Texture {
}
ShadowRight = Texture {
}
ShadowTop = Texture {
}
GlowBottom = Texture {
}
ShadowBottom = Texture {
}
ShadowTopRight = Texture {
}
GlowTop = Texture {
}
GlowTopRight = Texture {
}
ShadowBottomLeft = Texture {
}
GlowTopLeft = Texture {
}
ShadowTopLeft = Texture {
}
GlowRight = Texture {
}
GlowBottomRight = Texture {
}
GlowBottomLeft = Texture {
}
}