Talking to myself, but in case someone else is attempting, there is a mention in this in the release notes:
45548 - [Provisioning/SCVMM] Virtual Machine templates must not have a network adapter or hardware profile attached to them in order for cloning to succeed. If provisioning fails due to this, log in to VM console to remove the association, run SCVMM endpoint data collection again in vCAC to pick up the change, and rerun provisioning.