Registering logger does nothing

[Wowhere]

Describe the bug
After registering logger it is not log anything

To Reproduce

1. Register logger
2. Run http server from EmbedIO
3. Send requests to srsong locations (404 error)

Result: Log is empty. Debugging shows that Log method dont invoked
(Original code https://github.com/Wowhere/SimpleServers/blob/main/Models/HttpServer.cs)
Steps to reproduce the behavior:

using System;
using System.Threading;
using EmbedIO;
using EmbedIO.Actions;
using EmbedIO.WebApi;
using EmbedIO.Files;
using EmbedIO.Authentication;
using EmbedIO.Routing;
using System.Collections.Generic;
using ReactiveUI;
using System.Diagnostics;
using System.Security.Cryptography.X509Certificates;
using Swan;
using System.IO;
using System.Text;

namespace simpleserver.Models
{
    public class ServerLogger : Swan.Logging.ILogger
    {
        public Swan.Logging.LogLevel LogLevel =>
            Swan.Logging.LogLevel.Debug;
        private MemoryStream memoryStream = new MemoryStream() {};
        private StreamWriter logWriter;
        //private StreamReader logReader;
        public void Dispose()
        {
            throw new NotImplementedException();
        }
        public ServerLogger()
        {
            logWriter = new StreamWriter(memoryStream);
        }
        public void Log(Swan.Logging.LogMessageReceivedEventArgs logEvent)
        {
            using (logWriter)
            {
                logWriter.WriteLine(logEvent.CallerLineNumber);
                logWriter.WriteLine(logEvent.UtcDate);
                logWriter.WriteLine(logEvent.Message);
                logWriter.WriteLine(logEvent.Exception);
            }
            //Debug.Write(logEvent.ToJson());
        }
        public string GetCapturedLogs()
        {
            string line = "";
            using (var reader = new StreamReader(memoryStream))
            {
                line = reader.ReadToEnd();
            }
            return line;
        }
    }
    public class TestController : WebApiController
    {
        [Route(HttpVerbs.Get, "/_test")]
        public string Test() {
            HttpContext.Response.Headers.Clear();
            HttpContext.Response.Headers.Add("Server: Test Server");
            return "Test OK";
        }
        public TestController() {
        }

    }
    public class HttpServerRunner : ReactiveObject
    {
        public string port = "8080";
        public string folder = "";
        public string Status = "Init";
        public string Log = "";
        public bool IsLaunched = false;
        public bool IsSecure = false;
        CancellationTokenSource ctSource;
        private WebServer server;
        public HttpServerRunner()
        {
        }
        public void Start()
        {
            try
            {
                
                ctSource = new CancellationTokenSource();
                //string certPath = $"File://{Application.streamingAssetsPath}/cert.pfx";
                //var cert = new X509Certificate2(new X509Certificate($"{Application.streamingAssetsPath}/cert.pfx"));
                Swan.Logging.Logger.RegisterLogger<ServerLogger>();
                server = new WebServer(o => o
                    .WithUrlPrefix("http://*:" + port)
                    .WithMode(HttpListenerMode.EmbedIO))
                    .WithLocalSessionManager()
                    .WithStaticFolder("/", folder, true, m => m.WithContentCaching())
                    .WithModule(new ActionModule("/", HttpVerbs.Any, ctx => ctx.SendDataAsync(new { Message = "Get Index page" })))
                    .WithWebApi("/_test", m => m.WithController<TestController>());

                //var options = new WebServerOptions()
                //    .WithCertificate()
                //    .WithAutoRegisterCertificate(true);
                //Swan.Logging.Logger.RegisterLogger<ServerLogger>();
                Status = "Running";
                ServerLogger logger = new ServerLogger();
                Log = logger.GetCapturedLogs();
                IsLaunched = true;
                server.RunAsync(ctSource.Token).ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                IsLaunched = false;
                Status = ex.Message.ToString();
            }
        }
        public void Stop()
        {
            ctSource.Cancel();
            IsLaunched = false;
            Status = "Stopped";
        }
    }
}

Expected behavior
Log have data

Desktop (please complete the following information):

• OS: Windows 10