Authors CurseForge

Hi, I've been getting this eror everytime I port or go into an instance. I have the addon up to date.

Message: Interface\AddOns\Raven\Main.lua:701: bad argument #1 to 'match' (string expected, got nil)
Time: 06/29/15 19:31:09
Count: 1
Stack: [C]: ?
[C]: in function `match'
Interface\AddOns\Raven\Main.lua:701: in function `CheckLibBossIDs'
Interface\AddOns\Raven\Conditions.lua:787: in function `UpdateConditions'
Interface\AddOns\Raven\Main.lua:662: in function `Update'
Interface\AddOns\Raven\Main.lua:426: in function <Interface\AddOns\Raven\Main.lua:424>
Interface\SharedXML\C_TimerAugment.lua:16: in function <Interface\SharedXML\C_TimerAugment.lua:14>

Locals:

How do I fix it?