Root Domain Redirect Error

Original Request

http://worldenergysource.com/wes/stores/1/president-obamas-energy-picks-true-believers-p1255c105.aspx

Redirect URL

Error:

Could not load file or assembly 'System.Net.Http, Version=4.1.1.3, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.