No access to WebGUI, SSH or samba shares after upgrading from 2.X to 3.X with omv-release-upgrade

My system was fully upgraded in 2.x from the webgui. I had omvextras installed to be able to use transmission. To upgrade to 3.x, I enabled ssh in webgui, logged in with the osx terminal and used the command "omv-release-upgrade", which started to upgrade my system.

I got some kind of error in the end (will attach full install log, was too long to be included as a code snippet), but I am not sure how to interpret it. Afterwards, I can't log in via ssh ("connection refused"), the webgui doesn't work and my samba shares aren't available. I can log in locally, but that is about it. Using "omv-release-upgrade" produces "command not found"

dpkg -l | grep openm #produces
iU openmediavault 3.0.87 all
Open network attached storage solution
ii openmediavault-keyring 0.4 all
GnuPG archive keys of the OpenMediaVault archive
iU openmediavault.omvextrasorg 3.4.26 all
OMV-Extras.org Package Repositories for OpenMediaVault
ii openmediavault-transmissionbt 1.4 all
OpenMediaVault Transmission (BitTorrent client) plugin.

Any ideas of what I could do to salvage the situation?

Sorry for the double post, it was not intentional. I got an error message trying to post, tried again, and didn't realize that it had been posted.