Report viewer Export to Excel XLS Fail

I am having an issue on the report viewer, when I save to .xls using de right click option on the report viewer.
When I try to open the file it says it is corrupt and won’t open, the .xls file looks empty.
Saving as a pdf works fine.
I`m Using Ignition 8.1

Righ Click on the Report Viewer
image

Error

Thanks