This may sound too obvious, but since it fails at the very 1st line, are you sure the ArcObjects module is installed?...should see the ArcID module I think it is called in the Normal template in the project panel.
Another way is to see if you have the libraries installed is to open the Object Browser and look at the loaded classes....should have ones prefixed with 'esri'....or query directly for the object interface it failed on (coincidentally in the 1st line), IGeoProcessor.