C # errors when working with *.xlsx files

There is a code

private void buttonAct_Click(object sender, EventArgs e)
{
    try
    {
        _excelApp = new Excel.Application();
        _wkb = _excelApp.Workbooks.Open(fileName,
        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
        Type.Missing, Type.Missing, Type.Missing, Type.Missing,
        Type.Missing, Type.Missing);

        Excel.Worksheet worksheet = (Excel.Worksheet)_wkb.Worksheets[1];                
        Excel.Range excelRange = worksheet.UsedRange;               
        object[,] valueArray = (object[,])excelRange.get_Value(
                    Excel.XlRangeValueDataType.xlRangeValueDefault);
        //access the cells
        for (int row = 1; row <= worksheet.UsedRange.Rows.Count; ++row)
        {                    
            articul = valueArray[row, 1].ToString();
        }
    }
    catch (Exception ex)
    {

        throw ex;
    }
    finally
    {
        //clean up stuffs
        _wkb.Close(false, Type.Missing, Type.Missing);
        Marshal.ReleaseComObject(_wkb);

        _excelApp.Quit();
        Marshal.FinalReleaseComObject(_excelApp);
    }

}

When you open an Excel workbook, this error will get thrown:

It is impossible to bring a COM object of type "Microsoft.Office.Interop.Excel.ApplicationClass" to the interface type "Microsoft.Office.Interop.Excel._Application". The operation failed because the QueryInterface COM component call for the interface with IID "{000208D5-0000-0000-C000-000000000046}" returned the following error: An error occurred while loading the library. (Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY)).

I ask for help. Thank you