Addons: Clique and Xperl

I get the Error:
Interface\Addons\Clique\Plugins\Clique_BlizzUnitFrames.lua:38:38 attempt to call method 'RegisterForClicks' (a nil value)
I've tried 3 different versions of xperl with no luck. Any help would be greatly appreciated.
Interface\Addons\Clique\Plugins\Clique_BlizzUnitFrames.lua:38:38 attempt to call method 'RegisterForClicks' (a nil value)
I've tried 3 different versions of xperl with no luck. Any help would be greatly appreciated.