Error on SCP copying from HP ProCurve Switch

I'm unable to run Get-SCPFile on an HP ProCurve Switch. The command I use with a working pscp.exe -based bash script is:
pscp.exe -scp manager@A.B.C.D:/cfg/running-config switch.conf

PS C:\script> Get-SCPFile -ComputerName A.B.C.D -Credential (Get-Credential manager) -LocalFile "C:\tftp\switch.conf" -RemoteFile "/cfg/running-config" -Force -Verbose
VERBOSE: Using SSH Username and Password authentication for connection.
WARNING: Host key for A.B.C.D is not being verified since Force switch is used.
VERBOSE: Connection successful
VERBOSE: Downloading /cfg/running-config
Get-SCPFile : scp: "/cfg/running-config": No such file or directory
At line:1 char:1
+ Get-SCPFile -ComputerName A.B.C.D -Credential (Get-Credential m ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (Renci.SshNet.ScpClient:ScpClient) [Get-SCPFile], ScpException
    + FullyQualifiedErrorId : SSH.GetScpFile

Why is it working with pcsp.exe but not Powershell?

Start with the Get-SCPFile entry point and compare its behavior with the working pscp.exe command shown in the issue. Investigate how the remote path /cfg/running-config is handled, then verify that Get-SCPFile can retrieve it from the HP ProCurve Switch without the reported no-such-file error.