Error in the system log

I keep getting this error in my system log.  Do you know how I can find out what is causing it?

A public action method 'RetrieveProductRibbons' was not found on controller 'SevenSpikes.Nop.Plugins.ProductRibbons.Controllers.ProductRibbonsController'.

Hi, 

The problem was recently fixed. You should update your plugin to the latest version.