RouteTable.Routes.MapHubs() throwing ArgumentNullException only in the Windows Azure emulator. Why?-Collection of common programming errors

System.ArgumentNullException was unhandled HResult=-2147467261 Message=Value cannot be null. Parameter name: instanceName Source=Microsoft.AspNet.SignalR.Core ParamName=instanceName

StackTrace: at Microsoft.AspNet.SignalR.Hosting.HostDependencyResolverExtensions.InitializeHost(IDependencyResolver resolver, String instanceName, CancellationToken hostShutdownToken) at Owin.OwinExtensions.UseType[T](IAppBuilder builder, Object[] args) at Owin.OwinExtensions.MapHubs(IAppBuilder builder, String path, HubConfiguration configuration) at System.Web.Routing.SignalRRouteExtensions.c_DisplayClass7.b_5(IAppBuilder map) at Microsoft.Owin.Host.SystemWeb.OwinAppContext.Initialize(Action1 startup) at Microsoft.Owin.Host.SystemWeb.OwinBuilder.Build(Action1 startup) at System.Web.Routing.RouteCollectionExtensions.MapOwinPath(RouteCollection routes, String name, String pathBase, Action`1 startup) at System.Web.Routing.SignalRRouteExtensions.MapHubs(RouteCollection routes, String name, String path, HubConfiguration configuration) at System.Web.Routing.SignalRRouteExtensions.MapHubs(RouteCollection routes, String path, HubConfiguration configuration) at System.Web.Routing.SignalRRouteExtensions.MapHubs(RouteCollection routes, HubConfiguration configuration) at System.Web.Routing.SignalRRouteExtensions.MapHubs(RouteCollection routes) at Cerebello.MvcApplication.RegisterRoutes(RouteCollection routes) in c:\Projetos\Cerebello\Cerebello\CerebelloWebRole\Global.asax.cs:line 25 at CerebelloWebRole.Code.Helpers.RouteHelper.RegisterAllRoutes() in c:\Projetos\Cerebello\Cerebello\CerebelloWebRole\Code\Helpers\RouteHelper.cs:line 82 at CerebelloWebRole.WebRole.Run() in c:\Projetos\Cerebello\Cerebello\CerebelloWebRole\WebRole.cs:line 23 at Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.StartRoleInternal() at Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.StartRole() at Microsoft.WindowsAzure.ServiceRuntime.Implementation.Loader.RoleRuntimeBridge.b__2() at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException: