That error displays after roughly 10 seconds of attempting to deliver the data immediately. Some reports are too big to generate in this amount of time. In this scenario, a regular administrator would just click on the Results tab and wait for the report to finish there. The reporting feature for Event Managers is built on the same platform as normal administrators in Luminate, but it looks a little different. Event Managers should once again click on the Reports tab and click Report Results. They will see their report queued there.

The report may also take longer than normal to finish based on other tasks that are running in your site. For more details, see Why are tasks in Luminate (such as emails, queries, reports, etc.) taking longer than normal to complete?