Rsyslog service failed to start

Issue

• Rsyslog service failed to start after updating the system from RHEL7 to RHEL8

[root@rhel8 ~]# systemctl status rsyslog.service 

 rsyslog.service - System Logging Service
   Loaded: loaded (/usr/lib/systemd/system/rsyslog.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Wed 2021-07-28 18:04:49 -03; 948ms ago
     Docs: man:rsyslogd(8)
           https://www.rsyslog.com/doc/
  Process: 23020 ExecStart=/usr/sbin/rsyslogd -n $SYSLOGD_OPTIONS (code=exited, status=1/FAILURE)
 Main PID: 23020 (code=exited, status=1/FAILURE)

Jul 28 18:04:49  systemd[1]: rsyslog.service: Service RestartSec=100ms expired, scheduling restart.
Jul 28 18:04:49  systemd[1]: rsyslog.service: Scheduled restart job, restart counter is at 5.
Jul 28 18:04:49  systemd[1]: Stopped System Logging Service.
Jul 28 18:04:49 systemd[1]: rsyslog.service: Start request repeated too quickly.
Jul 28 18:04:49  systemd[1]: rsyslog.service: Failed with result 'exit-code'.
Jul 28 18:04:49  systemd[1]: Failed to start System Logging Service.