I have 2 CentOS 7 servers running Virtualmin that I recently updated. After the update, both servers got notifications on the dashboard:
A problem was detected with your Virtualmin license :
An error occurred checking the licence : Invalid host or serial number A renewal can be purchased at http://www.virtualmin.com/shop
License for both servers is GPL as stated on /etc/virtualmin-license.
Any help in resolving this issue will be appreciated.