For more than a year now I'm experiencing issues when trying to generate SmartEvent reports for custom time periods. Several service requests didn't solve the issue that existed in R80 and still in R80.10.
The example below shows a Security Checkup Report generation with R80.10 Jumbo Hotfix (Take 56).
As you can see in the screen shot above, pre-defined time periods 'Last 30 Days, Last 7 Days, This Month, etc.' work like a charm. Unluckily there is no pre-defined 'Last Month' time period. Whenever I'm configuring the time period of the previous month manually, the report generation fails. I'm experiencing this issue on all SmartEvent R80.x installations, so this seems to be a more general bug.
Did anyone of you experience the same?