Count me in for this issue. Attached are my diagnostics. Besides the error, everything seems normal. nazaretianrack-diagnostics-20190528-1341.zip
Upgrade did not go smooth from 6.5.1. I ran the CA Upgrade Checker, which showed I was good to go. I'll have to debug when I get home. It's not up locally at all. I'll need to get a monitor & keyboard connected to debug further. ☹️ Upgrade was fine. I believe the system got stuck in BIOS or at shutdown. Power button immediately powered the system down and it booted up like normal afterward.