Inventory item not found

[teezyyoxo]

Hi all, I'm fairly certain that I'm doing something wrong here. I've done everything per the documentation (or so I think) and am able to get the UI to appear. I submit either a serial or valid FQDN/hostname of a Mac in Jamf and make sure the dropdown at the bottom is correct, and get the following message in return.

What should I check?

EDIT: Doing more research and it looks like this won't work on Macs that "don't know" they are being LAPS-managed. Our local admin account is provisioned through prestage, and I'm getting the feeling that a prestage local admin and LAPS cannot coexist. Or maybe I have this completely misunderstood.