FIXED! Removing RCLootCouncil has fixed this on the classic era servers. I'll leave this up for others to see in case they have the same issue.

---

Title basically, sorry I can't be of more help but here is the error code, any ideas... looks like something to do with a small blue pouch?

286x ...erface\AddOns\BagBrother\addons\core\classes\bag.lua:187: attempt to call field 'GetBagSlotFlag' (a nil value)
[string "@interface\AddOns\BagBrother\addons\core\classes\bag.lua"]:187: in function Update' [string "@Interface\AddOns\BagBrother\addons\core\classes\bag.lua"]:124: in function RegisterEvents'
[string "@interface\AddOns\BagBrother\addons\core\classes\bag.lua"]:73: in function <...erface\AddOns\BagBrother\addons\core\classes\bag.lua:18>
[string "=(tail call)"]: ?
[string "@interface\AddOns\BagBrother\addons\core\classes\bagGroup.lua"]:17: in function <...e\AddOns\BagBrother\addons\core\classes\bagGroup.lua:11>
[string "=(tail call)"]: ?
[string "@interface\AddOns\Bagnon\src\frame.lua"]:285: in function CreateBagGroup' [string "@Interface\AddOns\Bagnon\src\frame.lua"]:265: in function PlaceBagGroup'
[string "@interface\AddOns\Bagnon\src\frame.lua"]:91: in function Layout' [string "@Interface\AddOns\Bagnon\src\frame.lua"]:66: in function Update'
[string "@interface\AddOns\Bagnon\src\frame.lua"]:56: in function RegisterSignals' [string "@Interface\AddOns\BagBrother\addons\core\classes\frameBase.lua"]:19: in function <...\AddOns\BagBrother\addons\core\classes\frameBase.lua:17> [string "=[C]"]: in function Show'
[string "@interface\AddOns\BagBrother\addons\core\api\frames.lua"]:85: in function `Show'
[string "@interface\AddOns\BagBrother\addons\core\features\autoDisplay.lua"]:60: in function <...dOns\BagBrother\addons\core\features\autoDisplay.lua:59>

Locals:
self = {
FilterIcon = {
}
Count = {
}
link = "|cffffffff|Hitem:828::::::::30:::::::::|h[Small Blue Pouch]|h|r"
info =

{
}
frame = BagnonBankFrame1 {
}
Icon = {
}
0 =
}
info = {
owned = "828::::::::30:::::::::"
class = 1
bind = 0
crafting = false
equip = "INVTYPE_BAG"
level = 5
icon = 133636
quality = 1
link = "|cffffffff|Hitem:828::::::::30:::::::::|h[Small Blue Pouch]|h|r"
id = 828
subclass = 0
stack = 1
price = 250
count = 6
name = "Small Blue Pouch"
family = 0
expac = 254
minLevel = 0
cached = true
}
id = 5
(for generator) = defined =[C]:-1
(for state) = {
1 = "bags-icon-equipment"
2 = "bags-icon-consumables"
3 = "bags-icon-tradegoods"
4 = "bags-icon-junk"
5 = "bags-icon-questitem"
}
(for control) = 1
i = 1
atlas = "bags-icon-equipment"
(*temporary) = nil
(*temporary) = 5
(*temporary) = 2
(*temporary) = "attempt to call field 'GetBagSlotFlag' (a nil value)"