Errors while setting up ExtractMetaData within Extract Structured Data activity

I’m trying to read the Structured data out of Acme Test and am stumbling on a roadblock when I try to setup ExtractMetaData field.
Is there an easy way to set it up?
I get an error saying “Invalid path in xml file”. I can’t seem to find a quick reference for reading structured data from a web page.

Any help would be appreciated.