I also emailed this to the support email, but wasn't sure where would be the best or most responsive place, so I apologize for double messages.
I am using the official Pi image from Channels and booting from a USB drive, I have been running it for a little over a year.
Last night I saw there was an update for the OS portion of my Pi DVR so I applied it, I hadn't seen one since April. It rebooted but never came back. There was a brief time I saw the UI via the web and it showed the new version but it was waiting on NTP sync. After that all I see is connection refused messages in the browser.
I then moved the Pi to a place with a monitor so I could see it boot, it seemed to be stuck at a message about "wait until kernel time synchronized"
Last night I started to backup the drive and recordings to my PC so I could just do a fresh install and restore, but it errored out at some point so this morning I started to see if I could get the DVR working again via SSH. I must be doing something wrong or it isn't loading the public keys correctly. I either get an error about denied due to public key, or I get connection refused like I see in the browser.
I went back to the direct connection to a monitor, and this latest attempt to boot I see it seems to have loaded farther, but still nothing working. It says to contact support, so that is what I am doing. Hopefully we can rescue the install as the recording transfer will take quite some time.
Sorry if this is kind of all over the place, I just wanted to make sure I shared all the things I had been trying and saw. I am a server administrator so I do understand a good amount of tech, but Linux and Pi are for sure not my strong areas.

