Generate excel using epplus library

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C#3.5

I am trying to create a excel file using EPPlus library in C#.
However, I'm unable to open the created excel file with error message as following:
"Unreadable content found".

EPPlus library link: EPPlus-Create advanced Excel spreadsheets on the server - Download: EPPlus 4.1[^]

Please check my code and let me know what I am missing.

What I have tried:

Following below mentioned is the code I'm using:

using (ExcelPackage pck = new ExcelPackage())
            {
                //Create the worksheet
                ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Demo");

                //Load the datatable into the sheet, starting from cell A1. Print the column names on row 1
                ws.Cells["A1"].LoadFromDataTable(dt, true);

                //Format the header for column 1-3
                using (ExcelRange rng = ws.Cells["A1:E1"])
                {
                    rng.Style.Font.Bold = true;
                    rng.Style.Fill.PatternType = ExcelFillStyle.Solid;      
                    rng.Style.Fill.BackgroundColor.SetColor(Color.BurlyWood);  
                    rng.Style.Font.Color.SetColor(Color.White);
                }
                
                //Write it back to the client
                Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";            
                Response.AddHeader("content-disposition", string.Format("attachment;  filename={0}", "ExcellData.xlsx"));
                Response.BinaryWrite(pck.GetAsByteArray());
            }

Below mentioned is dummy data for DataTable which I'm currently trying to show in excel:
            DataTable dt = new DataTable();
            dt.Columns.Add("SkillID");
            dt.Columns.Add("SkillName");
            dt.Columns.Add("BehaviorID");
            dt.Columns.Add("BehaviorName");
            dt.Columns.Add("ObjectiveDesc");

            DataRow dr1 = dt.NewRow();
            dr1[0] = "s11";
            dr1[1] = "s1";
            dr1[2] = "b11";
            dr1[3] = "b1";
            dr1[4] = "obj1";
            dt.Rows.Add(dr1);


            DataRow dr2 = dt.NewRow();
            dr2[0] = "s11";
            dr2[1] = "s1";
            dr2[2] = "b22";
            dr2[3] = "b2";
            dr2[4] = "obj2";
            dt.Rows.Add(dr2);


            DataRow dr3 = dt.NewRow();
            dr3[0] = "s11";
            dr3[1] = "s1";
            dr3[2] = "b33";
            dr3[3] = "b3";
            dr3[4] = "obj3";
            dt.Rows.Add(dr3);