No parameterless constructor defined for this object - asp.net mvc

Question

https://www.youtube.com/watch?v=s3o8iuoDMyI&t=371s&ab_channel=C%23CodeAcademy

So I was following this guide but came across the problem of "No parameterless constructor defined for this object".

The solutions that I've been seeing is that I need to use a dependency injection, but I'm still struggling to understand it.

This is my code:

//HomeController

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Judging_System.Models;
using System.Data.SqlClient;
using Judging_System.Controllers;
using Microsoft.Extensions.Logging;






namespace Judging_System.Controllers
{
    public class HomeController : Controller
    {
        SqlConnection con = new SqlConnection();
        SqlCommand com = new SqlCommand();
        SqlDataReader dr;
        private readonly ILogger<HomeController> _logger;
        List<Events> events = new List<Events>();

        // GET: Home

        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
            con.ConnectionString = Judging_System.Properties.Resources.ConnectionString;
        }
        [HttpGet]
        public ActionResult Index()
        {
            return View();
        }

 
        private void FetchData()
        {
            if(events.Count > 0)
            {
                events.Clear();
            }
            try
            {
                con.Open();
                com.Connection = con;
                com.CommandText = "Select top (1000) [Id], [Event], [Venue], [Date], [Time] from [tbl_Events].[Id]";
                dr = com.ExecuteReader();

                while (dr.Read())
                {
                    events.Add(new Events() { Id = dr["Id"].ToString(),
                         Event = dr["Event"].ToString()
                        ,Venue = dr["Venue"].ToString()
                        ,Date = dr["Date"].ToString()
                        ,Time = dr["Time"].ToString()
                        });
                }
                con.Close();
            }

            catch (Exception ex)
            {
                throw ex;
            }
        }

        [HttpPost]

        public ActionResult Contestants()
        {
            return View();
        }

        public ActionResult Latest_Events()
        {
            return View();
        }

        public ActionResult Past_Events()
        {
            return View();
        }

        public ActionResult Calendar()
        {
            return View();
        }

        public ActionResult Reports()
        {
            return View();
        }

        //Under Maintenance

        public ActionResult User_Account()
        {
            return View();
        }
        public ActionResult Events(Events events)
        {
            
            FetchData();
            con.Open();
            com.Connection = con;
            com.CommandText = "select * from tbl_Events where Id='" + events.Id + "'and Event='" + events.Event +
                "'and Venue='"+ events.Venue + "'and Date='" + events.Date + "'and Time='" + events.Time +"'";
            dr = com.ExecuteReader();
            return View(events);
        }

        public ActionResult Criteria_For_Judging()
        {
            return View();
        }

        public ActionResult Judges()
        {
            return View();
        }

        public ActionResult Participants()
        {
            return View();
        }
        public ActionResult Pointing_System()
        {
            return View();
        }
    }
}

//Events.cshtml

@{
    ViewData["Title"] = "Events";
    Layout = "~/Views/_HomeLayoutPage.cshtml";
    string[] TableHeaders = new string[] { "Id", "Events", "Venue", "Date", "Time" };
}

<div class="table">
    <table class="table table-bordered  table-hover">
        <thead>
            <tr>
                @{
                    foreach (var head in TableHeaders)
                    {
                        <th>
                            @head
                        </th>
                    }
                }

            </tr>

        </thead>



        <tbody>
            @{
                if (Model != null)
                {
                    foreach (var Data in Model)
                    {
                        <tr>
                            <td>@Data.Event</td>
                            <td>@Data.Venue</td>
                            <td>@Data.Date</td>
                            <td>@Data.Time</td>
                        </tr>
                    }
                }
            }
        </tbody>
    </table>
</div>

Thanks for the help.