Tukukkk

  app.Map("/signalr", map =>

            {

                // Setup the CORS middleware to run before SignalR.

                // By default this will allow all origins. You can 

                // configure the set of origins and/or http verbs by

                // providing a cors options with a different policy.

                map.UseCors(CorsOptions.AllowAll);

                var hubConfiguration = new HubConfiguration

                {

                    // You can enable JSONP by uncommenting line below.

                    // JSONP requests are insecure but some older browsers (and some

                    // versions of IE) require JSONP to work cross domain

                    //EnableJSONP = true

                };

                // Run the SignalR pipeline. We're not using MapSignalR

                // since this branch already runs under the "/signalr"

                // path.

                map.RunSignalR(hubConfiguration);

            });







[11/19/2018 8:48:10 PM]:Exception has been thrown by the target of an invocation.;   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object arguments, Signature sig, Boolean constructor)

       at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object parameters, Object arguments)

       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture)

       at Microsoft.Owin.Hosting.ServerFactory.ServerFactoryAdapter.Create(IAppBuilder builder)

       at Microsoft.Owin.Hosting.Engine.HostingEngine.StartServer(StartContext context)

       at Microsoft.Owin.Hosting.Engine.HostingEngine.Start(StartContext context)

       at Microsoft.Owin.Hosting.Starter.DirectHostingStarter.Start(StartOptions options)

       at Microsoft.Owin.Hosting.Starter.HostingStarter.Start(StartOptions options)

       at Microsoft.Owin.Hosting.WebApp.StartImplementation(IServiceProvider services, StartOptions options)

       at Microsoft.Owin.Hosting.WebApp.Start(StartOptions options)

       at Microsoft.Owin.Hosting.WebApp.Start[TStartup](StartOptions options)

It throws the invocation exception to register Owin self host API without admin permission, but when we tried to run it with admin access, it works well.

But we don't want to run it with admin since of strict permission control in company. Are there any hints to fix it? Much appreciated.