Report viewer is not showing crystal report

Question

I am using VisualStudio 2019 and .Net Framework 4.7.2 version. I downloaded the crystal report SP26 by using this link: https://www.tektutorialshub.com/crystal-reports/crystal-reports-download-for-visual-studio/#crystal-reports-for-visual-studio. In the report viewer Loading function, I have bellow code:

private void crystalReportViewer1_Load(object sender, EventArgs e)
{
    MySqlConnection mySqlConnection = new MySqlConnection(ConnectionString);
    mySqlConnection.Open();

    rd.Load(@"C:\Users\papsa\TTM-Management\TTM-Management\CrylecturerReport.rpt");
            
    string st = "SELECT time_slot,Session FROM last_time_table WHERE default_year = '"+year+"' AND Session LIKE '%"+lecname+"%' ORDER BY time_slot ASC";

    MySqlDataAdapter mySqlDataAdapter = new MySqlDataAdapter();
    mySqlDataAdapter.SelectCommand = new MySqlCommand(st, mySqlConnection);
    DataSet ds = new DataSet();
    mySqlDataAdapter.Fill(ds, "lecturers");
    rd.SetDataSource(ds);
    crystalReportViewer1.ReportSource = rd;
} 

When I run the project it displays me only the report viewer. at least it is not showing the margins of the crystal report. does anyone knows the reason?