Please, check at SSH connection time that the password authentication is not disabled. It is not the same as keyboard-interactive and is advised to be disabled by some tutorials. It is done in /etc/ssh/sshd_config with attribute “PasswordAuthentication” set to “no”.
OpenSSH also warns about it:
debug2: Unrecognized authentication method name: password [preauth] debug3: userauth_finish: failure partial=0 next methods="publickey,keyboard-interactive" [preauth]