Log into your vps through ssh as root and run the following command

/usr/local/cpanel/cpkeyclt

this will force your machine to re-sync with the license server. If this
does not resolve the issue for you please provide us with your ip and root
password so that we can address the matter for you.

Log into your vps through ssh as root and run the following command

/usr/local/cpanel/cpkeyclt

this will force your machine to re-sync with the license server.