Any time someone appears or disappears from the LFG interface when forming a group, raider.io causes Lua errors. I have tried isolating all addons and issue only appears when raider.io addon is enabled.

Message: bad argument #1 to '?' (Usage: local activityInfo = C_LFGList.GetActivityInfoTable(activityID [, questID, showWarmode]))
Time: Wed Apr 16 12:57:16 2025
Count: 36
Stack:
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:273: in function <[string "return function() -------------------------..."]:268>
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:395: in function <[string "return function() -------------------------..."]:389>
[tail call]: ?
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:550: in function <[string "return function() -------------------------..."]:543>
[C]: ?
[C]: in function 'LFGListApplicationViewer_UpdateApplicantMember'
[Interface/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua]:1802: in function <...ace/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua:1790>
[C]: in function 'LFGListApplicationViewer_UpdateApplicant'
[Interface/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua]:1761: in function 'LFGListApplicationViewer_InitButton'
[Interface/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua]:1502: in function 'initializer'
[Interface/AddOns/Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:374: in function 'InvokeInitializer'
[Interface/AddOns/Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:392: in function <...izzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua:391>
...[Interface/AddOns/Blizzard_SharedXMLBase/CallbackRegistry.lua]:147: in function 'TriggerEvent'
[Interface/AddOns/Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:319: in function 'SignalDataChangeEvent'
[Interface/AddOns/Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:299: in function 'SetDataProvider'
[Interface/AddOns/Blizzard_SharedXML/Shared/Scroll/ScrollBox.lua]:639: in function 'SetDataProvider'
[Interface/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua]:1785: in function 'LFGListApplicationViewer_UpdateResults'
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:877: in function <[string "return function() -------------------------..."]:800>
[C]: in function 'LFGListUtil_SortApplicants'
[Interface/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua]:1713: in function 'LFGListApplicationViewer_UpdateResultList'
[Interface/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua]:1518: in function 'onEvent'
[Interface/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua]:263: in function <...ace/AddOns/Blizzard_GroupFinder/Mainline/LFGList.lua:171>

Locals:
activeEntryInfo =

{
comment = "Kr2k"
requiredItemLevel = 0
duration = 1799
voiceChat = ""
privateGroup = false
newPlayerFriendly = false
isCrossFactionListing = false
name = "Kr1k"
activityIDs = {
}
autoAccept = false
requiredHonorLevel = 0
}

Same error here. Only happens when R.io addon is up and in LFG:

3733x bad argument #1 to '?' (Usage: local activityInfo = C_LFGList.GetActivityInfoTable(activityID [, questID, showWarmode]))
[C]: in function 'GetActivityInfoTable'
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:273: in function <[string "return function() -------------------------..."]:268>
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:395: in function <[string "return function() -------------------------..."]:389>
[tail call]: ?
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:550: in function <[string "return function() -------------------------..."]:543>
[C]: ?
[C]: in function 'LFGListApplicationViewer_UpdateApplicantMember'
[Blizzard_GroupFinder/Mainline/LFGList.lua]:1802: in function 'LFGListApplicationViewer_UpdateApplicant'
[Blizzard_GroupFinder/Mainline/LFGList.lua]:1761: in function 'LFGListApplicationViewer_InitButton'
[Blizzard_GroupFinder/Mainline/LFGList.lua]:1502: in function 'initializer'
[Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:374: in function 'InvokeInitializer'
[Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:392: in function <...izzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua:391>
...[Blizzard_SharedXMLBase/CallbackRegistry.lua]:147: in function 'TriggerEvent'
[Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:319: in function 'SignalDataChangeEvent'
[Blizzard_SharedXML/Shared/Scroll/ScrollBoxListView.lua]:299: in function 'SetDataProvider'
[Blizzard_SharedXML/Shared/Scroll/ScrollBox.lua]:698: in function 'SetDataProvider'
[Blizzard_GroupFinder/Mainline/LFGList.lua]:1785: in function 'LFGListApplicationViewer_UpdateResults'
[return function() --------------------------------------------------- GetPlaystyleString Fix --------------------------------------------]:877: in function <[string "return function() -------------------------..."]:800>
[C]: in function 'LFGListUtil_SortApplicants'
[Blizzard_GroupFinder/Mainline/LFGList.lua]:1713: in function 'LFGListApplicationViewer_UpdateResultList'
[Blizzard_GroupFinder/Mainline/LFGList.lua]:1518: in function 'onEvent'
[Blizzard_GroupFinder/Mainline/LFGList.lua]:263: in function <...aceBlizzard_GroupFinder/Mainline/LFGList.lua:171>

Locals:
(*temporary) = "bad argument #1 to '?' (Usage: local activityInfo = C_LFGList.GetActivityInfoTable(activityID [, questID, showWarmode]))"