You cannot add a new node. Updates for the control panel are not available according

[RocketMan]

VMmanager 5.74
CentOS 7

When I try to add a new node to my cluster, I got this error "You cannot add a new node. Updates for the control panel are not available according to your license type "

What is wrong with my license and how can I have it fixed?

[ksenya]

You need to check that you have updates for your license, as this error occurs on lifetime licenses, for which Updates package has already expired.

Log in to your Client area -- ISPsystem software licenses -- double click the license and check the Updates package expiration date.
If the package expired, you can update it by clicking the Update icon for the selected license.