This alert is not about your nworks license - it is about your VMWARE license.
Looking at the Path in the alert, this refers to a VMware server ausvc001, which I guess is your vCenter server?
This vCenter is logging the event License Inventory Not Compliant. You have some issue with the VMware licenses installed on that vCenter, and the number of hosts and/or the licensed features of those hosts.
You should check the license configuration in that vCenter.
Meantime, I will make sure our Knowledge Base is updated for that alert, just to make clear it is VMware licensing, not nworks licensing!
Hope that helps,
Vice President, Product Management