If I got UI bar enabled and keyring checked in, then i get this error:

136x [ADDON_ACTION_BLOCKED] AddOn 'Bartender4' tried to call the protected function 'UNKNOWN()'. [string "@!BugGrabber/BugGrabber.lua"]:481: in function <!BugGrabber/BugGrabber.lua:481> [string "=[C]"]: ? [string "@Bartender4/libs/LibWindow-1.1-18/LibWindow-1.1.lua"]:178: in function RestorePosition'
[string "@Bartender4/Bar.lua"]:313: in function LoadPosition' [string "@Bartender4/Bar.lua"]:238: in function ApplyConfig'
[string "@Bartender4/BlizzardArt.lua"]:156: in function ApplyConfig' [string "@Bartender4/BlizzardArt.lua"]:129: in function <Bartender4/BlizzardArt.lua:128> [string "=(tail call)"]: ? [string "=[C]"]: in function MainMenuBar_UpdateKeyRing'
[string "@FrameXML/MainMenuBar.lua"]:101: in function <FrameXML/MainMenuBar.lua:82>

Locals:
_ = Frame {
RegisterEvent = defined @!BugGrabber/BugGrabber.lua:487
0 =
UnregisterEvent = defined @!BugGrabber/BugGrabber.lua:487
SetScript = defined @!BugGrabber/BugGrabber.lua:487
}
event = "ADDON_ACTION_BLOCKED"
events =

{
ADDON_ACTION_BLOCKED = defined @!BugGrabber/BugGrabber.lua:553
ADDON_ACTION_FORBIDDEN = defined @!BugGrabber/BugGrabber.lua:553
PLAYER_LOGIN = defined @!BugGrabber/BugGrabber.lua:547
LUA_WARNING = defined @!BugGrabber/BugGrabber.lua:562
ADDON_LOADED = defined @!BugGrabber/BugGrabber.lua:507
}
`

But if I uncheck keyring in bag bar, then I wont get an error but the keyring button gets stuck on the center of the screen.

This is using newest version on classic era (SoD)