SSH service failing on reboot

Hi all,

I am working on Rock 5B which have Ubuntu 20.04 LTS server OS (Download from radxa official page), I am facing a issue of ssh service, Whenever I reboot the device ssh service is getting failed. Through debugging I manually starting the service and I am able to do ssh.

Please use below mentioned as reference.
Kindly help me with this.

root@rock-5b:/home/rock# sudo service ssh status
�● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/ssh.service; disabled; vendor preset: >
Active: inactive (dead)
Docs: man:sshd(8)

Below is the contents of service file (ssh.service)

[Unit] Description=OpenBSD Secure Shell server Documentation=man:sshd(8) man:sshd_config(5) auditd.service ConditionPathExists=!/etc/ssh/sshd_not_to_be_run

[Service] EnvironmentFile=-/etc/default/ssh ExecStartPre=/usr/sbin/sshd -t ExecStart=/usr/sbin/sshd -D $SSHD_OPTS ExecReload=/usr/sbin/sshd -t ExecReload=/bin/kill -HUP $MAINPID KillMode=process Restart=on-failure RestartPreventExitStatus=255 Type=notify RuntimeDirectory=sshd RuntimeDirectoryMode=0755

[Install] Alias=sshd.service

systemctl enable sshd