Please zip the folder which has provisioning results and attach it in a new post so we can help you troubleshoot this. You'll find it at /root/VMmark3/provisioning-output.
Hi, thank you for providing the files. Am I right in thinking that you've manually redacted the names of your vcenter, username, etc from these files?
I see you are using the same cluster, "friends-and-family" for both the VMmark cluster and clients cluster, or is that also a redacted value?
The script is trying to modify the network for the VMmark template vmmark3-template-053117. vCenter is returning "The operation is not supported on the object" which is a generic vCenter error. In vCenter Server web client, try modifying the network for the template manually to vmmark-test-network and see if you reproduce the error. Does your vCenter login have correct permissions, and your vSphere setup is fully licensed? Make sure vmmark3-template-053117 is actually a VM and not a vCenter template.