WebAPI OData 5.0 Beta: el acceso a GlobalConfiguration produce un error de seguridad

Recientemente instalé la versión de prelanzamiento del marco OData 5.0 de WebApi para jugar con el nuevo soporte $ expand. Todo está bien, pero tengo una excepción extraña en App_Start.

Attempt by security transparent method
'System.Web.Http.GlobalConfiguration.get_Configuration()' 
to access security critical type 'System.Web.Http.HttpConfiguration' failed.

Error de fuente:

Line 12:    protected void Application_Start()
Line 13:    {
Line 14:        WebApiConfig.Register(GlobalConfiguration.Configuration); // <--
Line 15:    }

Traza de la pila:

[TypeAccessException: Attempt by security transparent method 'System.Web.Http.GlobalConfiguration.get_Configuration()' to access 
security critical type 'System.Web.Http.HttpConfiguration' failed.]
   System.Web.Http.GlobalConfiguration.get_Configuration() +0
   API.WebApiApplication.Application_Start() in Global.asax.cs:14

[HttpException (0x80004005): Attempt by security transparent method 'System.Web.Http.GlobalConfiguration.get_Configuration()' to access 
security critical type 'System.Web.Http.HttpConfiguration' failed.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +12863325
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +175
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +304
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +404
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +475

[HttpException (0x80004005): Attempt by security transparent method 'System.Web.Http.GlobalConfiguration.get_Configuration()' to access 
security critical type 'System.Web.Http.HttpConfiguration' failed.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +12880068
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +159
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +12721257

Google revela muy poco.

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