Issue link: http://www.e-digitaleditions.com/i/176211
RAR is a proprietary compressed format. While some modern systems have basic support, most require a third-party tool.
You can often right-click and select "Extract All" directly in File Explorer. task.KUnLentz-4.rar
Download iZip or WinZip from your app store. 2. Extraction Steps (Desktop) How to Open RAR Files on Windows, Mac, and Mobile - Avast RAR is a proprietary compressed format