Can't Edit a Server File anymore Using the Tunnel Feature in Latest WinScp Version

Getting the error "Error while tunneling the connection" while editing any file on server in the recent WinSCP Version.

Checked and tried all possible steps. Ports are not used by any other process. And Tried Restarting and Updating Windows too.

I have been using this feature in WinSCP since many years, but now suddenly it got stopped in the latest version 5.19

See Error saving file on tunneled connection.