PowerCLI New-VM can't create new VM - Null Error Message

Hello,

So I've been looking into PowerCLI and wrote a Script which automaticly creates a VM. I tested in my Testlab an there it worked perfectly.

I then proceeded to test it in the productive enviroment which is a vCenter 6.5 there I get the Null Error from the New-VM cmdlt.

On the second productive vCenter 6.0 it works fine and also in my testlab with vCenter 6.7 installed.

I've read a few community post where other people have those problem but they didn't pass the portgroup parameter.

I passed the parametes Name, PortGroup, ResourcePool and Datastore. I also tired it with NetworkName instead of PortGroup and/or VMHost instead of ResourcePool.

Anybody an idea what I'm doing wrong or is it just a bug?

Best

Noah