I SSH'd into my box and did the normal sudo apt-get update && sudo apt-get upgrade to notice a slew of updates. Some of them did not want to cooperate, so I did a sudo apt-get dist-upgrade as I knew that Debian 9 was officially released. Many of the upgrades asked about the local configuration file and let me choose to keep the local file or the maintaner's version. I chose to keep the local file instead of the maintainer's version for each instance.
I am now left with OMV in a very unusable state. SSH still works, but the WebGUI is broken, Samba is broken, Plex, Syncthing, BitTorrent, etc. are all broken. Thankfully, I can still browse my files in ZFS, so I can backup my data. Any help would be greatly appreciated.