How to recreate the issue;
01. Start Cron
02. Go to : Reports -> Real Work ->Detailed work per resource - monthly ->> Select Organization, Team and the Month ( Screen shot attached : SS 01)
03. Check the results : Show report on screen ->> Display results on the screen ( Screen shot attached : SS 02)
04. Setup scheduled report : Sending report ->> Set Current year, Previous month, every day, time, send name and enter the email of other receivers ( Screen shot attached : SS 03)
05. Email received with attached PDF --> PDF display only the parameters, and says "No Data to Display" ( Screen shot attached : SS 04)

Hope I followed all the steps correctly.
What should be the reason for non-availability of work data ?

Thanks.