Bug report

If an Excel file that contains Shapes is imported in the Spreadsheet, the imported content cannot be exported back to '.xlsx' file. Saving the imported content to Excel throws an error in the console.

Reproduction of the problem

1. Open this demo
2. Import the attached "Download Issue.xlsx" file that has one shape and one Image in the Sheet1.
3. The file import will be successfully executed. The shape from the file is not visible in the Spreadsheet(this is expected behavior as the Spreadsheet component does not support Shapes, so they are ignored during the import process)
4. Export(save) the Spreadsheet content as Excel file

Current behavior

Exporting the Spreadsheet content throws an error in the console:

Expected/desired behavior

The Spreadsheet content should be exported to Excel file that doesn't contain the shapes from the imported file

Environment

• Kendo UI version: 2019.3.1023
• jQuery version: x.y
• Browser: [all]