404 Not Found [IP: 2xx1:67c:x:x::23 80] Unable to correct missing packages. E: Failed to fetch

[j143]

System Info

$ lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.5 LTS
Release:        18.04
Codename:       bionic

$ dpkg --print-architecture
amd64

/etc/apt/sources.list

$ cat /etc/apt/sources.list
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu/ bionic main restricted
# deb-src http://archive.ubuntu.com/ubuntu/ bionic main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu/ bionic-updates main restricted
# deb-src http://archive.ubuntu.com/ubuntu/ bionic-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu/ bionic universe
# deb-src http://archive.ubuntu.com/ubuntu/ bionic universe
deb http://archive.ubuntu.com/ubuntu/ bionic-updates universe
# deb-src http://archive.ubuntu.com/ubuntu/ bionic-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://archive.ubuntu.com/ubuntu/ bionic multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ bionic multiverse
deb http://archive.ubuntu.com/ubuntu/ bionic-updates multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ bionic-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu bionic partner
# deb-src http://archive.canonical.com/ubuntu bionic partner

deb http://security.ubuntu.com/ubuntu/ bionic-security main restricted
# deb-src http://security.ubuntu.com/ubuntu/ bionic-security main restricted
deb http://security.ubuntu.com/ubuntu/ bionic-security universe
# deb-src http://security.ubuntu.com/ubuntu/ bionic-security universe
deb http://security.ubuntu.com/ubuntu/ bionic-security multiverse
# deb-src http://security.ubuntu.com/ubuntu/ bionic-security multiverse
#deb [arch=ppc64el,arm64,amd64] http://suro.ubaya.ac.id/mariadb/repo/10.3/ubuntu bionic main
# deb-src [arch=ppc64el,arm64,amd64] http://suro.ubaya.ac.id/mariadb/repo/10.3/ubuntu bionic main
# deb-src [arch=amd64,arm64,ppc64el] http://suro.ubaya.ac.id/mariadb/repo/10.3/ubuntu bionic main
#deb [arch=ppc64el,amd64,arm64] https://mirrors.shu.edu.cn/mariadb/repo/10.3/ubuntu bionic main
# deb-src [arch=ppc64el,amd64,arm64] https://mirrors.shu.edu.cn/mariadb/repo/10.3/ubuntu bionic main
#deb [arch=amd64,arm64,ppc64el] https://mirrors.shu.edu.cn/mariadb/repo/10.2/ubuntu bionic main
# deb-src [arch=amd64,arm64,ppc64el] https://mirrors.shu.edu.cn/mariadb/repo/10.2/ubuntu bionic main
#deb [arch=amd64,arm64,ppc64el] http://mariadb.nethub.com.hk/repo/10.3/ubuntu bionic main allow-downgrade-to-insecure=yes allow-insecure=yes
# deb-src [arch=amd64,arm64,ppc64el] http://mariadb.nethub.com.hk/repo/10.3/ubuntu bionic main
# deb-src [arch=amd64,arm64,ppc64el] http://mariadb.nethub.com.hk/repo/10.3/ubuntu bionic main allow-downgrade-to-insecure=yes
# deb-src [arch=arm64,ppc64el,amd64] http://mariadb.nethub.com.hk/repo/10.3/ubuntu bionic main allow-insecure=yes
#deb [arch=arm64,amd64,ppc64el] http://mirrors.tuna.tsinghua.edu.cn/mariadb/repo/10.3/ubuntu bionic main
# deb-src [arch=arm64,amd64,ppc64el] http://mirrors.tuna.tsinghua.edu.cn/mariadb/repo/10.3/ubuntu bionic main
#deb [arch=amd64,arm64,ppc64el] http://sfo1.mirrors.digitalocean.com/mariadb/repo/10.3/ubuntu bionic main
# deb-src [arch=amd64,arm64,ppc64el] http://sfo1.mirrors.digitalocean.com/mariadb/repo/10.3/ubuntu bionic main
#deb [arch=amd64,arm64,ppc64el] https://mirrors.piconets.webwerks.in/mariadb-mirror/repo/10.5/ubuntu bionic main
# deb-src [arch=amd64,arm64,ppc64el] https://mirrors.piconets.webwerks.in/mariadb-mirror/repo/10.5/ubuntu bionic main
# deb-src [arch=arm64,amd64,ppc64el] https://mirrors.piconets.webwerks.in/mariadb-mirror/repo/10.5/ubuntu bionic main

Error

$ sudo apt install python3-sphinx

Ign:1 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 python3-pil amd64 5.1.0-1ubuntu0.5
Err:1 http://security.ubuntu.com/ubuntu bionic-updates/main amd64 python3-pil amd64 5.1.0-1ubuntu0.5
  404  Not Found [IP: 2001:67c:1360:8001::23 80]
Unable to correct missing packages.
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/p/pillow/python3-pil_5.1.0-1ubuntu0.5_amd64.deb  404  Not Found [IP: 2001:67c:1360:8001::23 80]
E: Aborting install.

The http://security.ubuntu.com/ubuntu/pool/main/p/pillow/python3-pil_5.1.0-1ubuntu0.5_amd64.deb link gives Not Found.

Originally posted by @j143 in #110 (comment)

[j143]

Related:

[j143]

I tried this

$ sudo dpkg --remove-architecture arm64

dpkg: warning: cannot remove non-foreign architecture 'arm64'

[j143]

doing sudo apt update.

Now,

sudo apt install python3-sphinx

works fine.