Export to xls failed

[matthieurobin]

Describe the bug
The export to xls failed. There are no data into the generated file.

To Reproduce

1. Go to the demo website
2. Click on "Generate XLS"
3. Open the file

Screenshot

Note: I'm opening the file with LibreOffice

[abvas]

Yes. I have the same error.

[gharibi]

Unfortunately LibreOffice doesn't directly open the XLS export from JavaScript (which is in fact HTML export). There is a workaround for it according to their support page which you can see in HERE.