Ошибка An error occurred while starting the application

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
 
namespace ASP.CORE
{
    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
 
        }
 
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
 
            app.UseRouting();
 
            
 
            app.UseStaticFiles();
 
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "/",
                    template: "{controller=Home}/{action=Index}");
            });
 
  
        }
    }
}

app.UseRouting();

services.AddMvc(o=>o.EnableEndpointRouting  = false);

app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "/",
                    template: "{controller=Home}/{action=Index}");
 
                routes.MapRoute(
                   name: "/test",
                   template: "{controller=Home}/{action=Test}");
            });

routes.MapRoute(
                    name: "/",
                    template: "{controller=Home}/{action=Index}");