I am facing issue when previewing Packing Slip report.

I extended the Packing Slip report with little or no customization and deployed the report. 

Then I navigated to All fullfilled Orders > selected a record >  Packing Slip (pick and pack) > Copy Preview. 

Below error came. See screen shot. Then I went to event viewer and found the below warning.

Fact loader is cancelled while waiting for ProcessStageData to complete

Pls help to solve the issue