*Message: Interface/AddOns/SUI/Modules/Chat/_Friendlist.lua:181: attempt to index local 'classc' (a nil value)
Time: Thu Jan 4 11:32:40 2024
Count: 1
Stack: Interface/AddOns/SUI/Modules/Chat/_Friendlist.lua:181: attempt to index local 'classc' (a nil value)
[string "@Interface/FrameXML/FriendsFrame_Shared.lua"]:1116: in function FriendsFrame_CheckBattlenetStatus' [string "@Interface_Vanilla/FrameXML/FriendsFrame_Vanilla.lua"]:121: in function FriendsFrame_OnEvent'
[string "*FriendsFrame.xml:3817_OnEvent"]:1: in function <[string "*FriendsFrame.xml:3817_OnEvent"]:1>

Locals: frame = FriendsFrameBattlenetFrame {
0 =
UnavailableInfoFrame = Frame {
}
BroadcastButton = Button {
}
BroadcastFrame = Frame {
}
UnavailableInfoButton = Button {
}
UnavailableLabel = FontString {
}
Tag = FontString {
}
}
playerRealmID = 5832
playerRealmName = "Chaos Bolt"
playerFactionGroup = "Horde"

what could i do?

Classic is not supported anymore.