Last Accessed date missing on Most/Least Activity analysis report (4281690)

When attempting to run a Most/Least Activity analysis report at the site collection level for least activity, the Last Accessed date is missing on the report.

The issue may be caused by either of the following:

• The "Page Requests" flag is not enabled in the Usage and Health Service Application.
• User is selecting a date range outside the retention period of the "Page Requests" flag.

• Enable the "Page Requests" flag in the Usage and Health Service Application either through Central Administration or by running the PowerShell command below:

  Set-SPUsageDefinition -Identity "Page Requests" -DaysRetained 31
  
  Note: The -DaysRetained can be modified based on available storage and reporting needs.

• Ensure that users are not reporting on a longer time period than the "Retention" range for the "Page Requests" flag.