Content Usage Statistics Report may generate a blank report when a large number of users are selected
A blank Content Usage Statistics Report may be generated if too many users are selected in the Report Specifications > Select Users field. This causes issues when attempting to generate a report for all enrolled users as no default behaviour is specified.
9th of December, 2015
Active with known workaround but no fix.
Instead of selecting all students, run the report with a smaller number of users selected.