Why does my redirect return an error in Preview?

This usually happens in our Preview, when the Redirect URL field contains a relative URL. Since these Redirect URLs do not exist in Hawk, these errors are returned:

One option would be to update the Redirect URL to use an absolute path OR use our Preview URL to test. For example:

http://test.hawksearch.net/sites/demo/_preview/preview.aspx?prv=1&keyword=returns%20test

Entering the trigger (in this case, the phrase "returns test") will still return an error, but the URL will show the Redirect URL specified:

http://test.hawksearch.net/returnpolicy