Events fail to load on the events tab of the VECO when a large timeframe is used. This typically occurs when user attempts to load a large number of events within a large timeframe. For example, here we observe events fail to load when we attempt to load the past 31 days.
This is a known limitation with the VECO, this is not a defect. This limitation will be fixed starting with 6.1.0.0. As a workaround for current builds, continue to attempt to load the events tab by using the refresh button (this sometimes helps), use a shorter timeframe, or use the filter feature of the events tab to narrow down on events that are loaded on the events page.
This is the filter feature that is being referenced too.