ASP .NET Core WebAPI - hostowanie w IIS

Witam.
Drugi dzień już walcze z tym i szlak mnie trafia, bo to nie jest tak jak w tych tutorialach na necie.
Próbuje na IIS hostować WebAPI i niby konfiguracja banalna, ale jednak u mnie nie działa.

1. Zrobiłem folder z projektem C:\inetpub\wwwroot\api
2. Zrobiłem Publish projektu i wkleiłem do folderu z punktu 1
3. Dodałem nową witrynę do IIS - bez nazwy hosta, adresy IP - Wszystkie nieprzypisane, port 9009
4. W Program.cs mam

       public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
           WebHost.CreateDefaultBuilder(args)
           .UseKestrel()
           .UseUrls("http://*:9009")
           .UseContentRoot(Directory.GetCurrentDirectory())
           .UseIISIntegration()
           .UseStartup<Startup>();
   }

   Odpalam witrynę w przeglądarce to mam błąd:

   HTTP Error 500.30 - ANCM In-Process Start Failure
   Common causes of this issue:
   The application failed to start
   The application started but then stopped
   The application started but threw an exception during startup
   Troubleshooting steps:
   Check the system event log for error messages
   Enable logging the application process' stdout messages
   Attach a debugger to the application process and inspect
   For more information visit: https://go.microsoft.com/fwlink/?LinkID=2028265

   Sprawdzam co ciekawego pokazują logi systemowe, są dwa błędy:

   Application '/LM/W3SVC/1/ROOT' with physical root 'C:\inetpub\wwwroot\api\' failed to load clr and managed application. CLR worker thread exited prematurely

   Application '/LM/W3SVC/1/ROOT' with physical root 'C:\inetpub\wwwroot\api\' hit unexpected managed exception, exception code = '0xe0434352'. Last 4KB characters of captured stdout and stderr logs:
   Application startup exception: System.NullReferenceException: Object reference not set to an instance of an object.
   at API.Startup.ConfigureServices(IServiceCollection services) in C:\Users\user\source\repos\API\API\Startup.cs:line 34
   --- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services)
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.Initialize()
   --- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()
   crit: Microsoft.AspNetCore.Hosting.Internal.WebHost[6]
     Application startup exception
   System.NullReferenceException: Object reference not set to an instance of an object.
   at API.Startup.ConfigureServices(IServiceCollection services) in C:\Users\user\source\repos\API\API\Startup.cs:line 34
   --- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services)
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.Initialize()
   --- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()
   crit: Microsoft.AspNetCore.Server.Kestrel[0]
     Unable to start Kestrel.
   System.IO.IOException: Failed to bind to address http://[::]:9009: address already in use. ---> Microsoft.AspNetCore.Connections.AddressInUseException: Tylko jedno użycie każdego adresu gniazda (protokół/adres sieciowy/port) jest normalnie dozwolone ---> System.Net.Sockets.SocketException: Tylko jedno użycie każdego adresu gniazda (protokół/adres sieciowy/port) jest normalnie dozwolone
   at System.Net.Sockets.Socket.UpdateStatusAfterSocketErrorAndThrowException(SocketError error, String callerName)
   at System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Bind(EndPoint localEP)
   at Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.SocketTransport.BindAsync()
   --- End of inner exception stack trace ---
   at Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.SocketTransport.BindAsync()
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.<>c__DisplayClass21_0`1.<<StartAsync>g__OnBind|0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindEndpointAsync(ListenOptions endpoint, AddressBindContext context)
   --- End of inner exception stack trace ---
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindEndpointAsync(ListenOptions endpoint, AddressBindContext context)
   at Microsoft.AspNetCore.Server.Kestrel.Core.ListenOptions.BindAsync(AddressBindContext context)
   at Microsoft.AspNetCore.Server.Kestrel.Core.AnyIPListenOptions.BindAsync(AddressBindContext context)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IServerAddressesFeature addresses, KestrelServerOptions serverOptions, ILogger logger, Func`2 createBinding)
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.StartAsync[TContext](IHttpApplication`1 application, CancellationToken cancellationToken)

   Nie mam nic innego włączonego na porcie 9009. Nie mam zielonego pojęcia co robię źle...

PS.
Próbuje to uruchomić na Windows 10 Pro 1809 (17763.253).
ASP .NET Core jest w wersji 2.2