Change the config file located at "\HelpPage\Views\Web.config" to have following version information in it:
System.Web.Mvc, Version=5.1.0.0
System.Web.WebPages.Razor, Version=3.0.0.0
Comments: Verified.
System.Web.Mvc, Version=5.1.0.0
System.Web.WebPages.Razor, Version=3.0.0.0
Comments: Verified.