NetworkManager-wait-online failed during a boot up

Issue

• 'NetworkManager-wait-online' failed during a boot up
• 'NetworkManager-wait-online' is inactive as below:

Last login: Wed Sep 1 04:51:15 2021 from 10.x.x.23
[systemd]
Failed Units: 1
 NetworkManager-wait-online.service
[core@your_node]$ systemctl status NetworkManager-wait-online
 NetworkManager-wait-online.service - Network Manager Wait Online
   Loaded: loaded (/usr/bin/systemd/system/NetworkManager-wait-online.service; enabled; vendor preset: disabled)
     Active: failed (Result: exit-code) since Fri 2021-06-04 11:10:02 UTC; 2months 27 days ago
   ...
  Process: 2363 ExecStart=/usr/bin/nm-online -s -q --timeout=30 (code=exited, status=1/FAILURE)
 ...
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.