Troubleshoot licensing issues

 
This should be pretty simple from a testing standpoint. Ensure that NSX Manager, ESXi, and vCenter Server are all properly licensed. You can do this by logging into the vSphere Web Client and navigating to Home -> Licensing
 

 
There will be tabs for vCenter Server Systems, Hosts, and Solutions.
 

 
Go to each tab and ensure that the vCenter Server, each ESXi host, and the NSX Manager, are all properly licensed.