I'm using WinSCP 3.8.2 to connect to a WinSSHd 4.02 server (using SFTP) on Windows.
I set the root SFTP dir to a read-only folder on another server UNC path and get the following error.
Error listing directory '/'. No such file or directory. Error code: 2 Error message from server: None Request code: 11 (A)bort, (R)etry, (S)kip: Skip Invalid access to memory
When setting NTFS permissions to read/write instead of read-only on the root SFTP folder it's working.