stunnel.service is getting failed - "stunnel.service: Consumed 7ms CPU time"

Issue

• stunnel.service is getting failed.

Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Child 15734 belongs to stunnel.service.
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Control process exited, code=exited, status=1/FAILURE
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Got final SIGCHLD for state start-pre.
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Failed with result 'exit-code'.
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Service will not restart (restart setting)
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Changed start-pre -> failed
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Job 10689 stunnel.service/start finished, result=failed
Aug 31 11:46:54 lab.example.com systemd[1]: Failed to start TLS tunnel for network daemons.
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Unit entered failed state.
Aug 31 11:46:54 lab.example.com systemd[1]: stunnel.service: Consumed 7ms CPU time.