Unable to get VM nic settings (Powershell)

I’m trying to pull a copy of a vm’s nic settings by using the NICs API but I’m getting nothing back. I’ve verified a hundred times that the VPGSettings ID and the VM ID are valid. I’m able to pull VPG settings and VM settings without issue.

My environment is replicated to a VCD. I’m trying to build a script to change all of the protected vms recovery networks.

function Get-ZertoVMNICs ($xZertoSession, $vpgSettingsID, $vmSettingsID)
{
     $xZertoSessionAPIURL = $xZertoSession.url + "/v1/vpgsettings/" + $vpgSettingsID + "/vms/" + $vmSettingsID "/nics"
     $xZertoSessionResponse = invoke-restmethod -uri $xZertoSessionAPIURL -headers $xZertoSession.token -contenttype "application/xml"
     return $xZertoSessionResponse
}