Error:Solution exception

HI,all.This is the first time I use Python in grasshopper .When i just put it out,it warned for “Solution exception:Method not found:rhino.Plugins.Plugin rhino.Plugins.Plugin.find(system.guid)”.And when i tried to duplicate the component,it poped up a window with a title that Unrecognized Objects.Can anyone help me solve this problem?I‘m grateful for your help.