ServiceStack Razor - “Forbidden” error for default

I am creating a ServiceStack based website using the Razor format engine. In the folder root of my project I have "default.cshtml", but attempting to navigate to the URL (on localhost) I receive a 302 redirect to default.cshtml and the following page:

Forbidden Request.HttpMethod: GET Request.PathInfo: /default.cshtml Request.QueryString: Request.RawUrl: /default.cshtml

Here is my Global.asax.cs:

public class AppHost : AppHostBase
{
    public AppHost() : base("OOMS 2.0", typeof(OOMS.ServiceInterface.OOMSService).Assembly) { }

    public override void Configure(Container container)
    {
        Plugins.Add(new RazorFormat());
        Plugins.Add(new RequestLogsFeature());
    }
}

public class Global : System.Web.HttpApplication
{
    protected void Application_Start(object sender, EventArgs e)
    {
        new AppHost().Init();
    }
}

And my web.config:

<appSettings>

  <add key="ResetAllOnStartUp" value="True" />
  <add key="webPages:Enabled" value="false" />
</appSettings>

<connectionStrings>

</connectionStrings>

<system.web>
  <compilation targetFramework="4.5" debug="true">


    <assemblies>
      <add assembly="System.Web.WebPages.Razor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    </assemblies>
    <buildProviders>
      <add extension=".cshtml" type="ServiceStack.Razor.CSharpRazorBuildProvider, ServiceStack.Razor" />
    </buildProviders>
  </compilation>
  <pages controlRenderingCompatibilityVersion="4.0" />
</system.web>
<system.webServer>
  <modules runAllManagedModulesForAllRequests="true" />
  <handlers>
    <!-- IIS7 -->
    <add path="*" name="ServiceStack.Factory" type="ServiceStack.HttpHandlerFactory, ServiceStack" verb="*" preCondition="integratedMode" resourceType="Unspecified" allowPathInfo="true" />
  </handlers>
</system.webServer>
<system.web.webPages.razor>
  <!--<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />-->
  <pages pageBaseType="ServiceStack.Razor.ViewPage">
    <namespaces>
      <add namespace="ServiceStack" />
      <add namespace="ServiceStack.Html" />
      <add namespace="ServiceStack.Razor" />
      <add namespace="ServiceStack.Text" />
      <add namespace="ServiceStack.OrmLite" />
      <add namespace="OOMS.Web" />
    </namespaces>
  </pages>

  <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc" />
</system.web.webPages.razor>

And of course the default.cshtml:

@{
}
<!doctype html>
<html lang="en-us">
    <body>
        Hello world
    </body>
</html>

Why can't the Razor engine pick up my default content page?

This ultimately appears to be some bad cached DLL or setting. Steps to resolve:

Analyzed debug information on the page displaying "Forbidden" by appending ?debug=requestinfo to the URL. This is a handy tool described in the ServiceStack online docs.
Stopped IIS Express and shutdown Visual Studio.
Cleared temporary ASP.Net files by deleting the contents of C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files
Removed & reinstalled the two offending NuGet packages, Microsoft.AspNet.WebPages and ServiceStack.Razor.
Cleaned & rebuilt, and happiness.