Upgrade completed with errors (14.04 -> 16.04)

[Haylee Schäfer]

I tried to update my Ubuntu VPS from version 14.04 to 16.04 and got the following error:

*** System restart required ***
Setting up odbcinst1debian2:amd64 (2.3.1-4.1) ...
Setting up odbcinst (2.3.1-4.1) ...
Setting up unixodbc (2.3.1-4.1) ...
Setting up console-setup-linux (1.108ubuntu15.3) ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-1.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-13.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-14.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-15.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-2.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-3.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-4.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-7.inc ...
Installing new version of config file /etc/console-setup/compose.ISO-8859-9.inc ...
Installing new version of config file /etc/console-setup/compose.VISCII.inc ...
Installing new version of config file /etc/console-setup/remap.inc ...
Processing triggers for systemd (229-4ubuntu21) ...
Processing triggers for initramfs-tools (0.122ubuntu8.9) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
Processing triggers for ca-certificates (20170717~16.04.1) ...
Updating certificates in /etc/ssl/certs...
0 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...
done.
chmod: cannot access '/sbin/udevd': No such file or directory
Error in function:

A fatal error occurred

Please report this as a bug and include the files
/var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log in
your report. The upgrade has aborted.
Your original sources.list was saved in
/etc/apt/sources.list.distUpgrade.

SystemError: E:Problem executing scripts DPkg::Post-Invoke 'chmod -x
/sbin/udevd', E:Sub-process returned an error code

Could not install the upgrades

The upgrade has aborted. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a).

Please report this bug in a browser at
http://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+filebug
and attach the files in /var/log/dist-upgrade/ to the bug report.
installArchives() failed

Upgrade complete

The upgrade has completed but there were errors during the upgrade
process.

To continue please press [ENTER]

-------------------------------

root@vps176907:~# lsb_release -rd
Description: Ubuntu 16.04.3 LTS
Release: 16.04

main.log: https://hastebin.com/alowuroxir.erl
apt.log: https://hastebin.com/jokahedifa.erl