[Satellite5] Cannot list available channels

Issue

• Unable to list the available channels in Satellite server.
• Listing available channels in satellite server is giving an error.

[root@satellite-server ~]# satellite-sync --list-channels
11:19:54 Red Hat Satellite - live synchronization
11:19:54    url: https://
11:19:54    debug/output level: 1
11:19:54
11:19:54
ERROR: there was a problem synchronizing the information.
       Error message: (-2, 'Name or service not known')