WowAce

Tested on a toon with only Handynotes (base, no other addons), Buggrabber, and Bugsack. Also tested on a toon with a full suite of addons. Same error message. There are additional errors that produce only a "(null)" record in Bugsack.

3x HandyNotes\HandyNotes_HandyNotes.lua:36: attempt to index global 'UnitPopupButtons' (a nil value)
[string "@HandyNotes\HandyNotes_HandyNotes.lua"]:36: in main chunk

Locals:
HandyNotes = <table> {
SetDefaultModuleLibraries = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:367
GetContinentZoneList = <function> defined @HandyNotes\HandyNotes.lua:229
GetMapFiletoMapID = <function> defined @HandyNotes\HandyNotes.lua:261
Enable = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:294
RegisterChatCommand = <function> defined @AnnoyingPopupRemover\Libs\AceConsole-3.0\AceConsole-3.0.lua:85
EnableModule = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:332
modules = <table> {
}
GetModule = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:210
IterateEmbeds = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:442
plugins = <table> {
}
defaultModuleLibraries = <table> {
}
UnregisterChatCommand = <function> defined @AnnoyingPopupRemover\Libs\AceConsole-3.0\AceConsole-3.0.lua:111
Printf = <function> defined @AnnoyingPopupRemover\Libs\AceConsole-3.0\AceConsole-3.0.lua:69
OnProfileChanged = <function> defined @HandyNotes\HandyNotes.lua:651
SetDefaultModulePrototype = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:409
UpdateMinimapPlugin = <function> defined @HandyNotes\HandyNotes.lua:421
name = "HandyNotes"
IsEnabled = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:451
orderedModules = <table> {
}
DisableModule = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:350
OnDisable = <function> defined @HandyNotes\HandyNotes.lua:639
OnEnable = <function> defined @HandyNotes\HandyNotes.lua:626
RegisterMessage = <function> defined @TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90
GetArgs = <function> defined @AnnoyingPopupRemover\Libs\AceConsole-3.0\AceConsole-3.0.lua:144
Print = <function> defined @AnnoyingPopupRemover\Libs\AceConsole-3.0\AceConsole-3.0.lua:54
OnInitialize = <function> defined @HandyNotes\HandyNotes.lua:608
UpdatePluginMap = <function> defined @HandyNotes\HandyNotes.lua:492
UpdateMinimap = <function> defined @HandyNotes\HandyNotes.lua:482
NewModule = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:235
IsModule = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:468
UpdateWorldMapPlugin = <function> defined @HandyNotes\HandyNotes.lua:406
SetDefaultModuleState = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:387
WorldMapDataProvider = <table> {
}
GetMapIDtoMapFile = <function> defined @HandyNotes\HandyNotes.lua:267
SetEnabledState = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:424
getXY = <function> defined @HandyNotes\HandyNotes.lua:255
enabledState = true
UpdateWorldMap = <function> defined @HandyNotes\HandyNotes.lua:412
RegisterEvent = <function> defined @TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:90
UnregisterAllMessages = <function> defined @TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:174
RegisterPluginDB = <function> defined @HandyNotes\HandyNotes.lua:152
UnregisterAllEvents = <function> defined @TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:174
SendMessage = <function> defined @TomTom\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:59
IterateModules = <function> defined @!KalielsTracker\Libs\AceAddon-3.0\AceAddon-3.0.lua:437
UnregisterMessage = <function> defined @TomTom\libs\CallbackHandler-1.0\Ca

It looks like that table is no longer present in UnitPopup.lua. I suspect there's now an API to call, instead.

https://github.com/Gethe/wow-ui-source/blob/live/Interface/FrameXML/

Interface/FrameXML/UnitPopup.lua was absolutely gutted. It looks like most of the related functionality was moved out to the other UnitPopupXXX.lua files.

https://github.com/Gethe/wow-ui-source/compare/9.2.0..live

Message: ...nterface\AddOns\HandyNotes\HandyNotes_HandyNotes.lua:36: attempt to index global 'UnitPopupButtons' (a nil value)
Time: Wed Jun 1 12:11:18 2022
Count: 1
Stack: ...nterface\AddOns\HandyNotes\HandyNotes_HandyNotes.lua:36: attempt to index global 'UnitPopupButtons' (a nil value)

Locals:

It stops throwing the error after I replace the first 8 items in the table with this. I haven't yet flown around to see if the addon actually works, though.

 [1] = {text = UnitPopupRaidTarget1ButtonMixin.GetText(), icon = UnitPopupRaidTarget1ButtonMixin.GetIcon()},
 [2] = {text = UnitPopupRaidTarget2ButtonMixin.GetText(), icon = UnitPopupRaidTarget2ButtonMixin.GetIcon()},
 [3] = {text = UnitPopupRaidTarget3ButtonMixin.GetText(), icon = UnitPopupRaidTarget3ButtonMixin.GetIcon()},
 [4] = {text = UnitPopupRaidTarget4ButtonMixin.GetText(), icon = UnitPopupRaidTarget4ButtonMixin.GetIcon()},
 [5] = {text = UnitPopupRaidTarget5ButtonMixin.GetText(), icon = UnitPopupRaidTarget5ButtonMixin.GetIcon()},
 [6] = {text = UnitPopupRaidTarget6ButtonMixin.GetText(), icon = UnitPopupRaidTarget6ButtonMixin.GetIcon()},
 [7] = {text = UnitPopupRaidTarget7ButtonMixin.GetText(), icon = UnitPopupRaidTarget7ButtonMixin.GetIcon()},
 [8] = {text = UnitPopupRaidTarget8ButtonMixin.GetText(), icon = UnitPopupRaidTarget8ButtonMixin.GetIcon()},

 ^ Yeah that seems to work. Nice!

Think i found where to change the lines. The LUA file that needs to be change can be found in your wow game folder under 

(your wow folder) retail\interface\AddOns\HandyNotes.

Open the file HandyNotes_HandyNotes.lua with wordpad and change the first 8 line to the lines in sparesimians post. Thank you sparesimian for the solution.

The lines you write over are these

[1] = UnitPopupButtons.RAID_TARGET_1, -- Star
[2] = UnitPopupButtons.RAID_TARGET_2, -- Circle
[3] = UnitPopupButtons.RAID_TARGET_3, -- Diamond
[4] = UnitPopupButtons.RAID_TARGET_4, -- Triangle
[5] = UnitPopupButtons.RAID_TARGET_5, -- Moon
[6] = UnitPopupButtons.RAID_TARGET_6, -- Square
[7] = UnitPopupButtons.RAID_TARGET_7, -- Cross
[8] = UnitPopupButtons.RAID_TARGET_8, -- Skull

so just delete them and replace with sparesimians solution.

[1] = {text = UnitPopupRaidTarget1ButtonMixin.GetText(), icon = UnitPopupRaidTarget1ButtonMixin.GetIcon()},
[2] = {text = UnitPopupRaidTarget2ButtonMixin.GetText(), icon = UnitPopupRaidTarget2ButtonMixin.GetIcon()},
[3] = {text = UnitPopupRaidTarget3ButtonMixin.GetText(), icon = UnitPopupRaidTarget3ButtonMixin.GetIcon()},
[4] = {text = UnitPopupRaidTarget4ButtonMixin.GetText(), icon = UnitPopupRaidTarget4ButtonMixin.GetIcon()},
[5] = {text = UnitPopupRaidTarget5ButtonMixin.GetText(), icon = UnitPopupRaidTarget5ButtonMixin.GetIcon()},
[6] = {text = UnitPopupRaidTarget6ButtonMixin.GetText(), icon = UnitPopupRaidTarget6ButtonMixin.GetIcon()},
[7] = {text = UnitPopupRaidTarget7ButtonMixin.GetText(), icon = UnitPopupRaidTarget7ButtonMixin.GetIcon()},
[8] = {text = UnitPopupRaidTarget8ButtonMixin.GetText(), icon = UnitPopupRaidTarget8ButtonMixin.GetIcon()},

this doesnt make the addon work for me though.  Still missing all icons.  Seems like it's a SL issue on second look.  only missing SL icons.

209x Usage: local sources = C_TransmogCollection.GetAppearanceSources(appearanceID, categoryType, transmogLocation)
[string "=[C]"]: in function `GetAppearanceSources'
[string "@HandyNotes_Shadowlands\core\rewards-Rewards.lua"]:411: in function `IsKnown'
[string "@HandyNotes_Shadowlands\core\rewards-Rewards.lua"]:446: in function `IsObtained'
[string "@HandyNotes_Shadowlands\core\nodes.lua"]:106: in function `IsCollected'
[string "@HandyNotes_Shadowlands\core\nodes.lua"]:472: in function <HandyNotes_Shadowlands\core\nodes.lua:471>
[string "=(tail call)"]: ?
[string "@HandyNotes_Shadowlands\core\nodes.lua"]:200: in function `Prepare'
[string "@HandyNotes_Shadowlands\core\map.lua"]:158: in function `Prepare'
[string "@HandyNotes_Shadowlands\common.lua"]:311: in function `Prepare'
[string "@HandyNotes_Shadowlands\core\core.lua"]:205: in function <HandyNotes_Shadowlands\core\core.lua:194>
[string "=(tail call)"]: ?
[string "@HandyNotes\HandyNotes-v1.6.5.lua"]:334: in function <HandyNotes\HandyNotes.lua:322>
...
[string "@Blizzard_MapCanvas\Blizzard_MapCanvas.lua"]:584: in function <...aceBlizzard_MapCanvas\Blizzard_MapCanvas.lua:583>
[string "=[C]"]: in function `secureexecuterange'
[string "@Blizzard_MapCanvas\Blizzard_MapCanvas.lua"]:587: in function <...aceBlizzard_MapCanvas\Blizzard_MapCanvas.lua:580>
[string "=[C]"]: ?
[string "=[C]"]: in function `OnMapChanged'
[string "@Blizzard_WorldMap\Blizzard_WorldMap.lua"]:234: in function `OnMapChanged'
[string "@Blizzard_MapCanvas\Blizzard_MapCanvas.lua"]:60: in function `SetMapID'
[string "@Blizzard_WorldMap\Blizzard_WorldMapTemplates.lua"]:308: in function `GoToMap'
[string "@Blizzard_WorldMap\Blizzard_WorldMapTemplates.lua"]:366: in function `myclick'
[string "@FrameXML\NavigationBar.lua"]:181: in function <FrameXML\NavigationBar.lua:171>