I get "This file's format is not supported or you don't specify a correct format" error when I try to open attached file with the following code : Aspose.Cells.Workbook wb = new Aspose.Cells.Workbook(@"C:\TEMP\test5\syn…...Save the file As "Microsoft Office Excel Workbook". Now you can...2013, 2019, 2021 Workbook, Office 365, and OpenOffice formats...