Not sure which addon to post this error to

[Damolann]

I'm not sure if this is a FCMQT or a LibCustomMenu error but it just started happening Tuesday after the NA Maintenance reset. If it's from FCMQT then I will probably never get a fix since that one appears abandoned.

This popped up at login:

Gui Warning: Failed to create control 'LibCustomMenuSubmenu'. Duplicate name.

Lua Error: user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:86: attempt to index a nil value
stack traceback:
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:86: in function 'Submenu:Initialize'
<Locals> self = [table:1]{}, name = "LibCustomMenuSubmenu" </Locals>
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:78: in function 'Submenu:New'
<Locals> self = [table:2]{__isAbstractClass = F}, object = [table:1] </Locals>
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:648: in function 'OnAddonLoaded'
 <Locals> event = 65536, name = "LibDebugLogger" </Locals>

And this pops up any time I try to view objects in my inventory with right click. I tried uninstalling FCO ItemSaver thinking that was the problem but the errors persist.

Lua Error: user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:570: attempt to index a nil value
 stack traceback:
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:570: in function 'CreateSubMenu'
<Locals> control = ud, state = 1 </Locals>
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:389: in function 'callback'
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:64: in function '(anonymous)'

Lua Error: user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:579: attempt to index a nil value
stack traceback:
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:579: in function 'CreateSubMenu'
<Locals> control = ud, state = 2 </Locals>
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:394: in function 'callback'
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:64: in function '(anonymous)'

Lua Error: user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:570: attempt to index a nil value
stack traceback:
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:570: in function 'CreateSubMenu'
<Locals> control = ud, state = 1 </Locals>
user:/AddOns/FCMQT/Libs/LibCustomMenu.lua:401: in function 'MouseDown'
<Locals> control = ud </Locals>