We've recently replaced one of the worker nodes in our cluster, and after installing Cloudmin on the new server, we're seeing two issues.
The first issue is that when we use the "Upgrade to Cloudmin Pro" link and enter our serial number and license key, Cloudmin comes back with a message saying the upgrade was successful, even though there was an APT error during the upgrade. After refreshing the page, or logging out, or rebooting the server, or re-checking the Cloudmin license, I see no changes (I'm especially looking for the Virtualmin Replication feature), and the link to upgrade to Cloudmin Pro still exists. We have a 10 instance license, and I expect that would cover the two instances we have, even plus the defunct one on the old server.
Attached is the screenshot of he successful Cloudmin Pro upgrade. I wasn't able to reproduce the APT error though, so I'm not sure if that even matters.
The other issue we're having is related to virtualization. It's technically not even a feature we need yet, but it displays a prominent message on the System Information page. We get the error "This system cannot be a KVM host : Your CPU does not have the VMX or SVM extensions needed for KVM", in spite of the fact that all the virtualization options are turned on in the server's BIOS. We're using a Dell Poweredge 2950, and the configuration of this node is the same as the first one in our cluster, which coincidentally, has no trouble at all with either of these issues.