Can someone please walk me through how to set up the Google Shopping Plugin because it's giving me an error. I get the error when I click on the Generated file path (static) link to download generated product feed. The error that I keep getting is An error occurred while executing the command definition. See the inner exception for details.

I'm thinking someone might have used the plugin before and successfully implemented it. Also, It seems that I have to do something on the side of Google and I need to generate some sort of feed but I don't know what exactly I should do to successfully set it up. Any help would be greatly appreciated.