To prevent querying large dataset with an “empty” report you can enable this feature flag.

• Navigate to [domain]/secure/admin/SiteDarkFeatures!default.jspa

  • On this page, add the “everit.jttp.at.least.one.user” key

  • if it is added and enabled:

    • on the “Reporting” page, at least one user or group (at least with one member) must be selected to generate a report

    • Warning message won’t appear on Chart Report, but the same restriction applies to it

• If you want to allow it again, you just have to click on the disabled button on this page. No need to restart and stop the addon.