Source Metrics URL leads to blank page

Sometimes a source metric category (e.g., API) will produce source URLs to indicate where your audience came from.  However, when you click on the URL, it takes you to a blank page.  Why? 

When Live content is placed on a page our tracking/analytics will try to fetch the URL of where the content has been placed.  In some cases the URL may have a referral code, for example, attached to it that disguises the content or will restrict us form returning that information because the referral code is driving SEO to the clients page.  The URL found in the Source Metrics will appear as[...].

Sometimes the URL might be http://localhost/[...], meaning the URL is tied to a specific machine or the device is not compatible with displaying the URL.  In this case, you may receive an internal 500 error.