While processing template api/[TodoController], a replacement value for the token TodoController could not be found

I'm new to this and following this .Net ASP.NET wep api tutorial but cant get past this error. When doing the "Test the GetTodoItems method" and running the Postman to get/set against the DB.

When I start debugging, Chrome launches and the following error is thrown:

System.InvalidOperationException: 'The following errors occurred with attribute routing information:

Error 1: For action: 'TodoApi.Controllers.TodoController.GetTodoItems (TodoApi)' Error: While processing template 'api/[TodoController]', a replacement value for the token 'TodoController' could not be found. Available tokens: 'action, controller'. To use a '[' or ']' as a literal string in a route or within a constraint, use '[[' or ']]' instead.

Error 2: For action: 'TodoApi.Controllers.TodoController.GetTodoItem (TodoApi)' Error: While processing template 'api/[TodoController]/{id}', a replacement value for the token 'TodoController' could not be found. Available tokens: 'action, controller'. To use a '[' or ']' as a literal string in a route or within a constraint, use '[[' or ']]' instead.'

This is my controller code straight from the tutorial:

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TodoApi.Models;

namespace TodoApi.Controllers
{
    [Route("api/[TodoController]")]
    [ApiController]
    public class TodoController : ControllerBase
    {
        private readonly TodoContext _context;

        public TodoController(TodoContext context)
        {
            _context = context;

            if (_context.TodoItems.Count() == 0)
            {
                // Create a new TodoItem if collection is empty,
                // which means you can't delete all TodoItems.
                _context.TodoItems.Add(new TodoItem { Name = "Item1" });
                _context.SaveChanges();
            }
        }

        // GET: api/Todo
        [HttpGet]
        public async Task<ActionResult<IEnumerable<TodoItem>>> GetTodoItems()
        {
            return await _context.TodoItems.ToListAsync();
        }

        // GET: api/Todo/5
        [HttpGet("{id}")]
        public async Task<ActionResult<TodoItem>> GetTodoItem(long id)
        {
            var todoItem = await _context.TodoItems.FindAsync(id);

            if (todoItem == null)
            {
                return NotFound();
            }

            return todoItem;
        }
    }

}

Here is the startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using TodoApi.Models;

namespace TodoApi
{
    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.AddDbContext<TodoContext>(opt =>
                opt.UseInMemoryDatabase("TodoList"));
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }

        // 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();
            }
            else
            {
                // The default HSTS value is 30 days. You may want to change this for 
                // production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseMvc();
        }
    }
}