An error occurred while using plugins for my Gimp 2.6.11

Hello. I have downloaded some plugins for my Gimp 2.6.11, but I am not able to use most of them. I have this project going on so I need to use a certain plugin.I am running windows 8 home .Every time I try to use a plugin, I get this error. Is anyone able to solve this. I am waiting for help.

An error occurred running python_fu_pattern_cubic. SystemError: new style getargs format but argument is not tuple
