SymptomsI opened https://expand-webinstall.swsoft.com/wui/, entered server IP and root password, pushed Start and the error occurred:
Error code #1002: AI distributive broken. Request for subsystem 'sftp' failed on channel '1'
CauseSuch error may occur if SFTP is disabled in SSH configuration.
ResolutionLook at your /etc/openssh/sshd_config and check the line:
Subsystem sftp /usr/lib/openssh/sftp-server
It should not be commented out with '#' sign.
Restart SSH after configuration file modification.