Why Do I get the error "Report templates for non-grouped items are missing" when attempting to report on selected items?
This error is caused by attempting to run a report that requires
the list of items to be "grouped" first.
Certain reports are designed only to report on grouped & sorted item lists.
To avoid this warning, and to "group" the item list to run this report, please do the following:
This will now run successfully without the above warning.