View the original community article here
Last tested: Oct 28, 2020
Error occurred while generating this dashboard - contact administrator (error: Render job XXX failed [query failed: Query failed with unexpected exception Failed to kill query]
Any render jobs that have an error message starting with
query failed: mean there was just a DB problem when running a query -- nothing specific to rendering or scheduling. Check the underlying tiles of the dashboard or look. If dashboard trying running each/downloading each individually to help isolate the error.