Typical response from Apple, showing they did not read the question in full, offering the incorrect solution and never following up. Apple products are great, but I swear they're just not up to the task for Enterprise. Everything is centered on personal users. Support for real issues in enterprise environments seems almost nonexistent.
So now we have two down laptops, including my own MacBook Pro which is a real problem, as I'm the Sys Admin for our company and there's a lot on there I now cannot access. All I wanted was to download macOS Server! App Store required an OS update for that (!!!), which hosed my laptop.
Now I have a second laptop that's dead for a user that JUST STARTED, and now cannot work. We had a third laptop in our company that the help desk kid just reinstalled her OS to fix. This is NOT A SOLUTION. Reinstalling an OS to fix a bug that Apple is certainly aware of is not a solution! I've seen people posting articles dating back a couple years with this same issue, and no resolution has been found.
This has existed since the Betas apparently, and was not fixed in the final release. Obviously a LOT of people experience this issue - three in one month in our company alone (the only three that updated to High Sierra), and we don't have more than 20 Macs. Countless articles on the Internet from others.
In my case, this issue happens even when the Macs are plugged into a docking station, which is plugged into physical Ethernet. Not having Ethernet ports, I can't plug in directly. I've also tried local logins. Though we use Centrify for Active Directory management, which caches credentials locally so you can log in anywhere. Is this issue related to local / network logins in any way??
Is there a resolution yet!?!?! Apple needs to take responsibility here, admit there's an issue, and post a fix! If I have to reinstall the OS on every laptop, I'm going to lose DAYS of time reinstalling everything. Again, this is not a fix.