I am facing the same issue that has been reported at Exporting to report to PDF in Kibana generates reports with empty data
When I export a visualization or dashboard as a PDF, I see a blank report exactly as the ones attached by the reporter in the above link.
As a result of this issue, I am not able to schedule automated reports using Watcher because I receive blank PDF attachments through email.
And as mentioned at this above URL by one of the elastic team members, is this because the time taken to fetch data from elasticsearch is too high?
Will it help if some timeout parameter is increased? If yes, which parameter should be increased and where?
Looking forward to a positive response from your end.