LMS Legacy reports are displaying incorrectly or has missing data.
This may have been triggered by a recent update of LMS.
While there may well be an issue with the legacy report; legacy reports are no longer supported. Furthermore, they aren't kept up-to-date with the current system updates like alterations made to database tables etc which can likely cause an issue. If this report is vital one could consider engaging professional services and they could try customize it so that it once again reports the data correctly.
Otherwise one could choose to hide all Legacy reports and use standard system reports for reporting needs (hiding these reports is the default configuration of LMS). To hide the legacy reports, go to System Admin > Configuration > System Configuration > LMS_ADMIN. Look for showLegacyReports, and set it to false (which is the default value)
LMS; Reports; Legacy; Issue; Error; Supported; Hide; Missing; Incorrect; , KBA , LOD-SF-LMS , Learning Management System , Problem