CMD cipher /e on a folder output "Request not supported"

cipher /e on a folder outputs Request not supported.

I'm running Microsoft Windows 10 Home

cipher is not supported on Home editions of Windows as it uses the Encrypting File System (EFS).

And:

EFS is available in all versions of Windows except the home versions (see Supported operating systems below) from Windows 2000 onwards.

...

• Windows 2000 Professional, Server, Advanced Server and Datacenter editions
• Windows XP Professional, also in Tablet PC Edition, Media Center Edition and x64 Edition
• Windows Server 2003 and Windows Server 2003 R2, in both x86 and x64 editions
• Windows Vista Business, Enterprise and Ultimate editions[9]
• Windows 7 Professional, Enterprise and Ultimate editions
• Windows Server 2008 and Windows Server 2008 R2
• Windows 8 and 8.1 Pro and Enterprise editions
• Windows Server 2012 and Windows Server 2012 R2
• Windows 10 Pro, Enterprise, and Education editions.
• Windows Server 2016
• Windows Server 2019

Source Encrypting File System - Wikipedia