dnf/upcp failing: This system is not registered with CloudLinux Network server.

Symptoms

Updates on a CloudLinux server report the following errors:

# checkyum version 22.3  (excludes: bind-chroot)
Command rhn_check exited with code zero. That usually means that registration is not needed. Use --force to override This system is not registered with CloudLinux Network server. CloudLinux Network based repositories will be disabled.

Cause

The CloudLinux license is not recognized as active.

Resolution

If it is active, resync the CloudLinux license:

# /usr/sbin/clnreg_ks --force

How to activate a CloudLinux license purchased from cPanel