VDI Serialized install of Acrobat Pro 17 crashes, or prompts for Adobe Application Manager Install. Why?

I have followed the following steps when installing Acrobat Pro 17 in my VDI scheme as an appstack:

VMware Horizon Deployments — Enterprise Administration Guide

Common Deployment Options — Enterprise Administration Guide (two of us have run this prov.xml file generator independently on different workstations and appstacks and had the same outcome during testing).

We have Acrobat Reader installed in our Gold Image. vSphere 6.7, AppVol Manager 2.14.2.11, Horizon 7 Administrator, Windows 10 LTSB, using writeable volumes, and instant clones.

It launches for most people (except for one person) but eventually pops up with an error that reads: "Adobe Acrobat Adobe Application Manager, required to run your trial, is missing or damaged. Please download a new copy of Adobe Application Manager from http://www.adobe.com/go/applicationmanager_en_il." The one person it does not launch for gets that warning immediately. Everyone else so far can click "Ok" and continue using Acrobat for a short while. Acrobat reader works but doesn't have the functionality we need. (On a side note, when we try to put Reader on an appstack, it crashes immediately. It didn't used to do that, and we're rather put out by this development but that's another thread).

We didn't buy the trial, we purchased the full thing. We've downloaded the full version that we paid for and are using the serial number directly from our login at the Adobe Worldwide Licensing page.

We use this program heavily (our old version is Acrobat Pro X) and we need to get this up to speed. Any help is appreciated!