Try to set an environment variable COMPLUS_version=v4.0.30319 in Windows:
https://winscp.net/eng/docs/message_net_runtime_newer_than_currently_loaded
(of course you need to have .NET framework 4 installed)

I was trying out the ability to archive and download, but I seem to be getting some kind of DLL dependency issue. The one DLL it says is a problem is the winscpnet.dll. I have searched for this DLL with the Everything program and it is there in the WinSCP directory. I also have the latest version (19) of 7Z installed if it's using that, I don't know. I added an attachment showing the error with Everything's search result for this DLL. I don't know where the log file is at. I don't see one in the WinSCP directory. Using SFTP.