You may encounter the following error when attempting to Unpublish a Page Wrapper:
Error: The Page Wrapper can not be unpublished as it is the default wrapper for security category xxxxx
Luminate Online requires the Page Wrapper selected as the default for a security category have an active version at all times. If you are receiving this error you can either assign a new Page Wrapper as the default for the security category or publish your new version. To publish the new version Select Publish under Actions for that version.