WoW Version
Which version of WoW this bug occurs in: ( Retail / Wrath Classic / Classic Era / All )

Cata Classic

AddOn skin name
Name of the AddOn skin producing this bug, if known

Describe the bug
Please include the Output from the bug reporting tool

1x Skinner/Core/UtilFuncs.lua:854: attempt to index local 'obj' (a nil value)
[string "@Skinner/Core/UtilFuncs.lua"]:854: in function keepFontStrings' [string "@Skinner/Core/UIFrames.lua"]:414: in function <Skinner/Core/UIFrames.lua:407> [string "=(tail call)"]: ? [string "=[C]"]: ? [string "=[C]"]: in function Show'
[string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:603: in function SetUIPanel' [string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:425: in function ShowUIPanel'
[string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:316: in function <...PanelManager/Classic/UIParentPanelManager_Shared.lua:312>
[string "=[C]"]: in function SetAttribute' [string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:1091: in function ShowUIPanel'
[string "@Blizzard_Calendar/Classic/Blizzard_Calendar.lua"]:990: in function Calendar_Show' [string "@Blizzard_Calendar/Classic/Blizzard_Calendar.lua"]:981: in function Calendar_Toggle'
[string "@Blizzard_UIParent/Cata/UIParent.lua"]:478: in function `ToggleCalendar'