asp.net-core – ASP.NET核心添加视图参数名称路径不能为空错误

错误消息是

There was an error running the selected code generator:
 'Value  cannot be null. 
 Parameter name:path'

该视图将用于ViewComponent.

我的步骤是

Right click -> 
 Add View -> 
 Type View Name -> 
 Uncheck 'Use a Layout Page' -> 
 Template : Empty -> 
 Click Add.

我搜索了一下,但找不到任何结果.

编辑：

这是一个Startup.cs

namespace Udemy.MvcWebUI
{
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.AddScoped<IUsersService,UsersManager>();
        services.AddScoped<IUsersDAL,EFUsersDAL>();

        services.AddScoped<IUsersInfoService,UsersInfoManager>();
        services.AddScoped<IUsersInfoDAL,EFUsersInfoDAL>();

        services.AddScoped<IEventTypesService,EventTypesManager>();
        services.AddScoped<IEventTypesDAL,EFEventTypesDAL>();

        services.AddScoped<IEventsService,EventsManager>();
        services.AddScoped<IEventsDAL,EFEventsDAL>();

        services.AddScoped<ICityService,CityManager>();
        services.AddScoped<ICityDAL,EFCityDAL>();

        services.AddScoped<IDistrictService,DistrcitManager>();
        services.AddScoped<IDistrictDAL,EFDistrictDAL>();

        services.AddDbContext<EventContext>(options => options.UseSqlServer(@"Server=localhostSQLEXPRESS;Database=Events;
                                        User Id=sa;Password=Omurcan.1994;"));

        services.AddMvc();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app,IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseFileServer();
        app.UseNodeModules(env.ContentRootPath);
        app.UseMvcWithDefaultRoute();

        // db tanimi icin
        using (var serviceScope = app.ApplicationServices.GetService<IServiceScopeFactory>().CreateScope())
        {
            var context = serviceScope.ServiceProvider.GetRequiredService<EventContext>();
            context.Database.EnsureCreated();
        }
    }
}
}

我该如何解决？

谢谢你的帮助.