I am trying to connect signalR endpoint using Yarp as a reverse proxy.

However I faced this error:

The yarp configuration is:

"ReverseProxy": {
    "Clusters": {
        "ws-cluster": {
        "Destinations": {
          "ws-destination1": {
            "Address": "http://localhost:8240"
          }  
        }
      }
    },
    "Routes": {
       "dev-ws": {
        "ClusterId": "ws-cluster",
        "CorsPolicy": "any",
        "Match": {
          "Path": "ws/{**catch-all}"
        }
      }
   }
}

and the signalR endpoint is:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
        
    app.UseAuthentication();
    app.UseRouting();
    app.UseCors(MyAllowSpecificOrigins);
    app.UseAuthorization();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapHub<HubService>("/ws");
        endpoints.MapControllers().RequireCors(MyAllowSpecificOrigins);
    });
}

And there is something strange about the gateway, when I call ws://localhost:8000/ws (The gateway has been hosted on port 8000) inside the server, it works! but if I use its domain from outside of the server it won't!

Is there a problem with IIS or do I need to apply a specific configuration?