License check-up or registration results in "No valid license found"

Issue

• Check license gives:

  # rhn_check
  # /usr/bin/cldetect --check-license
  No valid license found.

• Re-register attempt failed

  # /usr/sbin/clnreg_ks --force
  
  Server does not have active license yet. Trying to get one using IP licensing flow.
  rhn-plugin: Error communicating with server. The message was:
  com.cloudlinux.clos.domain.exceptions.xmlrpc.ClnXmlRpcException: License is not found  

Environment

• CloudLinux 
• CLN

Solution

Remove the server from CLN and re-register the server

Useful links

How to Register CloudLinux OS with Key-based/IP-based Licenses?