WotLK PTR LUA error (3.4.2.49705)

[quetzalin]

Got this error on the WotLK PTR (3.4.2.49705).

I wasn't in a raid and the error seems to have something to do with raid frames. Despite the error, the addon is working fine so far.

3x LunaUnitFrames/LunaUnitFrames.lua:496: attempt to index field 'hidden' (a nil value)
[string "@LunaUnitFrames/LunaUnitFrames.lua"]:496: in function <LunaUnitFrames/LunaUnitFrames.lua:495>
[string "=[C]"]: in function `CompactRaidFrameManager_UpdateShown'
[string "@FrameXML/SettingDefinitions/InterfaceOverrides.lua"]:277: in function <...e/FrameXML/SettingDefinitions/InterfaceOverrides.lua:274>
[string "=[C]"]: ?
[string "@SharedXML/CallbackRegistry.lua"]:178: in function <SharedXML/CallbackRegistry.lua:177>
[string "=[C]"]: ?
[string "@SharedXML/CallbackRegistry.lua"]:181: in function `TriggerEvent'
[string "@SharedXML/CvarUtil.lua"]:114: in function <SharedXML/CvarUtil.lua:106>

Locals:
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index field 'hidden' (a nil value)"
hideRaid = <function> defined @LunaUnitFrames/LunaUnitFrames.lua:483

[godsyn]

If anyone knows a fix for this, please post it here.