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First, verify if this error is correct.
Visit http://verify.cpanel.net and enter your server's primary IP address. If the server is not currently licensed, submit a ticket and we will correct this issue.
If your IP shows with an active license, your server may be having issues contacting the CPanel license server. Try running the following command to update the license:
# /usr/local/cpanel/cpkeyclt
Verify your DNS is working correctly and your firewall permits TCP port 2089.
[root@noc-training-linux ~]# nslookup hpcHost.com
Server: xxx.xxx.xxx.xxx
Address: xxx.xxx.xxx.xxx#53
Non-authoritative answer:
Name: hpcHost.com
Address: xxx.xxx.xxx.xxx
[root@noc-training-linux ~]#
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