Maybe Ash: /usr/libexec/sftp-server: not found when using scp - #3 by colo applies (i.e. use scp/rcp protocol instead of SFTP protocol), and lftp has automatic fallback to scp/rcp protocol (increasing lftp logging verbosity might confirm that).
Maybe Ash: /usr/libexec/sftp-server: not found when using scp - #3 by colo applies (i.e. use scp/rcp protocol instead of SFTP protocol), and lftp has automatic fallback to scp/rcp protocol (increasing lftp logging verbosity might confirm that).