NS Australia: Opening the Standard Report "Purchase by Tax Code (Details)" Throws error that the report was not found

By mistake, the report Purchase by Tax Code (Details) was saved using a different name, that is why it errored out.

To resolve the problem, customize your saved report (with a different name) and change it back to the original name "VAT Report - Purchase by Tax Code (Details)" then clicked on Save As.

Go back to Reports > VAT/GST > Purchase by Tax Code (Details) > you should now be able to access the report with no error.