vRA7.3 network security data collection failed.

We are building vRA 7.3 . Now we have added vCenter and NSX manager as endpoint in vRA. And associate NSX manager with vCenter. All of computing resource data collection works well but not NSX (network and security):

Now in our reservation, we only can see vSphere cluster, vDS port-group/logical switch but not Transport zone, security group/tags

When check the log, we see the following:

Workflow 'vSphereVCNSInventory' failed with the following exception:

One or more errors occurred.

Inner Exception: An error occurred while sending the request.

at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)

at DynamicOps.VCNSModel.Interface.NSXClient.GetDatacenters()

at DynamicOps.VCNSModel.Activities.CollectDatacenters.Execute(CodeActivityContext context)

at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager)

at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)

Inner Exception:

Any clue what's going wrong?

Thanks