Error pam authentication failure for root from

Dec 11 19:55:55 62763fb62f43 sshd[25706]: debug1: sshd version OpenSSH_7.2, OpenSSL 1.0.2g  1 Mar 2016
Dec 11 19:55:55 62763fb62f43 sshd[25706]: debug1: private host key #0: [redacted]
Dec 11 19:55:55 62763fb62f43 sshd[25706]: debug1: private host key #1: [redacted]
Dec 11 19:55:55 62763fb62f43 sshd[25706]: debug1: private host key #2: [redacted]
Dec 11 19:55:55 62763fb62f43 sshd[25706]: debug1: private host key #3: [redacted]
Dec 11 19:55:55 62763fb62f43 sshd(pam_google_authenticator)[25708]: debug: start of google_authenticator for "root"
Dec 11 19:55:55 62763fb62f43 sshd(pam_google_authenticator)[25708]: debug: Secret file permissions are 0600. Allowed permissions are 0600
Dec 11 19:55:55 62763fb62f43 sshd(pam_google_authenticator)[25708]: debug: "/root/.google_authenticator" read
Dec 11 19:55:55 62763fb62f43 sshd(pam_google_authenticator)[25708]: debug: shared secret in "/root/.google_authenticator" processed
Dec 11 19:55:55 62763fb62f43 sshd(pam_google_authenticator)[25708]: debug: google_authenticator for host "xxx.xx.x.x"
Dec 11 19:56:04 62763fb62f43 sshd(pam_google_authenticator)[25708]: Dummy password supplied by PAM. Did OpenSSH 'PermitRootLogin <anything but yes>' or some other config block this login?
Dec 11 19:56:04 62763fb62f43 sshd(pam_google_authenticator)[25708]: Dummy password supplied by PAM. Did OpenSSH 'PermitRootLogin <anything but yes>' or some other config block this login?
Dec 11 19:56:04 62763fb62f43 sshd(pam_google_authenticator)[25708]: Invalid verification code for root
Dec 11 19:56:04 62763fb62f43 sshd(pam_google_authenticator)[25708]: debug: end of google_authenticator for "root". Result: Authentication failure

Dec 11 19:56:04 62763fb62f43 sshd(pam_google_authenticator)[25708]: Dummy password supplied by PAM. Did OpenSSH 'PermitRootLogin <anything but yes>' or some other config block this login?
Dec 11 19:56:04 62763fb62f43 sshd(pam_google_authenticator)[25708]: Dummy password supplied by PAM. Did OpenSSH 'PermitRootLogin <anything but yes>' or some other config block this login?

Dec 11 20:18:11 62763fb62f43 sshd(pam_google_authenticator)[25729]: debug: start of google_authenticator for "root"
Dec 11 20:18:11 62763fb62f43 sshd(pam_google_authenticator)[25729]: debug: Secret file permissions are 0600. Allowed permissions are 0600
Dec 11 20:18:11 62763fb62f43 sshd(pam_google_authenticator)[25729]: debug: "/root/.google_authenticator" read
Dec 11 20:18:11 62763fb62f43 sshd(pam_google_authenticator)[25729]: debug: shared secret in "/root/.google_authenticator" processed
Dec 11 20:18:11 62763fb62f43 sshd(pam_google_authenticator)[25729]: debug: google_authenticator for host "xxx.xx.x.x"
Dec 11 20:18:21 62763fb62f43 sshd(pam_google_authenticator)[25729]: debug: no scratch code used from "/root/.google_authenticator"
Dec 11 20:18:21 62763fb62f43 sshd(pam_google_authenticator)[25729]: Accepted google_authenticator for root
Dec 11 20:18:21 62763fb62f43 sshd(pam_google_authenticator)[25729]: debug: end of google_authenticator for "root". Result: Success

# PAM configuration for the Secure Shell service

# Standard Un*x authentication.
auth required pam_google_authenticator.so debug
# @include common-auth

# Disallow non-root logins when /etc/nologin exists.
account    required     pam_nologin.so

# Uncomment and edit /etc/security/access.conf if you need to set complex
# access limits that are hard to express in sshd_config.
# account  required     pam_access.so

# Standard Un*x authorization.
@include common-account

# SELinux needs to be the first session rule.  This ensures that any
# lingering context has been cleared.  Without this it is possible that a
# module could execute code in the wrong domain.
session [success=ok ignore=ignore module_unknown=ignore default=bad]        pam_selinux.so close

# Set the loginuid process attribute.
session    required     pam_loginuid.so

# Create a new session keyring.
session    optional     pam_keyinit.so force revoke

# Standard Un*x session setup and teardown.
@include common-session

# Print the message of the day upon successful login.
# This includes a dynamically generated part from /run/motd.dynamic
# and a static (admin-editable) part from /etc/motd.
session    optional     pam_motd.so  motd=/run/motd.dynamic
session    optional     pam_motd.so noupdate

# Print the status of the user's mailbox upon successful login.
session    optional     pam_mail.so standard noenv # [1]

# Set up user limits from /etc/security/limits.conf.
session    required     pam_limits.so

# Read environment variables from /etc/environment and
# /etc/security/pam_env.conf.
session    required     pam_env.so # [1]
# In Debian 4.0 (etch), locale-related environment variables were moved to
# /etc/default/locale, so read that as well.
session    required     pam_env.so user_readenv=1 envfile=/etc/default/locale

# SELinux needs to intervene at login time to ensure that the process starts
# in the proper default security context.  Only sessions which are intended
# to run in the user's context should be run after this.
session [success=ok ignore=ignore module_unknown=ignore default=bad]        pam_selinux.so open

# Standard Un*x password updating.
# @include common-password