Comment 4 for bug 1774120

*I get the same result as @Hayden (https://launchpad.net/~recalcitrantowl):*

m*****o@M*****Z:~$ sudo apt update
Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Hit:2 http://archive.ubuntu.com/ubuntu bionic InRelease
Get:3 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [83.2 kB]
Hit:4 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Get:5 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [72.4 kB]
Get:6 http://security.ubuntu.com/ubuntu bionic-security/main Translation-en [26.0 kB]
Get:7 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [16.8 kB]Get:8 http://security.ubuntu.com/ubuntu bionic-security/universe Translation-en [8540 B]
Get:9 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [102 kB]
Get:10 http://archive.ubuntu.com/ubuntu bionic-updates/main Translation-en [38.0 kB]
Get:11 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [63.6 kB]
Get:12 http://archive.ubuntu.com/ubuntu bionic-updates/universe Translation-en [27.9 kB]
Fetched 522 kB in 18s (29.3 kB/s)
Reading package lists... Done
Building dependency tree
Preparing to unpack .../1-ubuntu-release-upgrader-core_1%3a18.04.18_all.deb ...
Unpacking ubuntu-release-upgrader-core (1:18.04.18) over (1:18.04.17) ...
Preparing to unpack .../2-python3-distupgrade_1%3a18.04.18_all.deb ...
Unpacking python3-distupgrade (1:18.04.18) over (1:18.04.17) ...
Preparing to unpack .../3-ebtables_2.0.10.4-3.5ubuntu2.18.04.1_amd64.deb ...
invoke-rc.d: could not determine current runlevel
 * Error: insufficient privileges to access the ebtables rulesets.
invoke-rc.d: initscript ebtables, action "stop" failed.
dpkg: warning: old ebtables package pre-removal script subprocess returned error exit status 1
dpkg: trying script from the new package instead ...
invoke-rc.d: could not determine current runlevel
 * Error: insufficient privileges to access the ebtables rulesets.
invoke-rc.d: initscript ebtables, action "stop" failed.
dpkg: error processing archive /tmp/apt-dpkg-install-2xpgP8/3-ebtables_2.0.10.4-3.5ubuntu2.18.04.1_amd64.deb (--unpack):
 new ebtables package pre-removal script subprocess returned error exit status 1
dmesg: read kernel buffer failed: Function not implemented
                                                          update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
invoke-rc.d: could not determine current runlevel
Preparing to unpack .../4-software-properties-common_0.96.24.32.3_all.deb ...
Unpacking software-properties-common (0.96.24.32.3) over (0.96.24.32.2) ...
Preparing to unpack .../5-python3-software-properties_0.96.24.32.3_all.deb ...
Unpacking python3-software-properties (0.96.24.32.3) over (0.96.24.32.2) ...
Errors were encountered while processing:
Calculating upgrade... Done
The following packages will be upgraded:
  ebtables
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
5 not fully installed or removed.
Need to get 0 B/79.9 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
(Reading database ... 28662 files and directories currently installed.)
Preparing to unpack .../ebtables_2.0.10.4-3.5ubuntu2.18.04.1_amd64.deb ...
invoke-rc.d: could not determine current runlevel
 * Error: insufficient privileges to access the ebtables rulesets.
invoke-rc.d: initscript ebtables, action "stop" failed.
dpkg: warning: old ebtables package pre-removal script subprocess returned error exit status 1
dpkg: trying script from the new package instead ...
invoke-rc.d: could not determine current runlevel
 * Error: insufficient privileges to access the ebtables rulesets.
invoke-rc.d: initscript ebtables, action "stop" failed.
dpkg: error processing archive /var/cache/apt/archives/ebtables_2.0.10.4-3.5ubuntu2.18.04.1_amd64.deb (--unpack):
 new ebtables package pre-removal script subprocess returned error exit status 1
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
invoke-rc.d: could not determine current runlevel
Errors were encountered while processing:
 /var/cache/apt/archives/ebtables_2.0.10.4-3.5ubuntu2.18.04.1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)