Бот не отвечает на сообщения

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using VkNet;
using VkNet.Abstractions;
using VkNet.Model;
 
namespace mafsbot1
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }
 
        public IConfiguration Configuration { get; }
 
        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<IVkApi>(sp =>
            {
                var api = new VkApi();
                api.Authorize(new ApiAuthParams
                {
                    AccessToken = Configuration["Config:AccessToken"]
                });
                return api;
            });
            services.AddControllers();
        }
 
        // 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.UseHttpsRedirection();
 
            app.UseRouting();
 
            app.UseAuthorization();
 
            app.UseEndpoints(endpoints => { endpoints.MapControllers(); });
        }
    }
}