I'm not sure about PowerShell version, but it must be the last one or one version before.
NetApp is 9.6.
I'm not Storage administrator, therefore sorry, if make a mistake in NetApp lexicon.
There is one name I've gotten from NetApp administrator, as my understanding it's a virtual name of Cluster.
I don't think there is some problem with connection, because no matter from which server I'm connected to the storage there are users I can get their information regarding storage usage, using Rest API, but PowerShell doesn't bring me such information, it brings nothing.