[BUG]Getting error while running GetCheckedOutFiles command in the powershell

[tatsutanaka]

I am using the "List.GetCheckedOutFiles" command to get all the checked-in files which have no checked in version.
However, I am encountering the below error:
Method invocation failed because [Microsoft.SharePoint.Client.List] does not contain a method named 'GetCheckedOutFiles'

I'm using the latest version of the CSOM : 16.0.6906.1200
Also the attached is the full script that I'm running.
Appreciate any help the community can provide.