update-manager crashed with apt_pkg.Error in open(): E:can not open /var/lib/apt/lists/archive.canonical.com_ubuntu_dists_disco_InRelease - fopen (13: Permission denied), E:The package lists or status file could not be parsed or opened.

[Henry E Wyatt Jr]

Update manager failed to start.

ProblemType: Crash
DistroRelease: Ubuntu 19.04
Package: update-manager 1:19.04.3
ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1
Uname: Linux 5.0.0-8-generic x86_64
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 29 15:34:37 2019
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 b'com.ubuntu.update-manager' b'launch-count' b'2'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'int64 1553888076'
InstallationDate: Installed on 2019-03-29 (0 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190326.2)
InterpreterPath: /usr/bin/python3.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Python3Details: /usr/bin/python3.7, Python 3.7.3, python3-minimal, 3.7.2-1
PythonArgs: ['/usr/bin/update-manager']
PythonDetails: /usr/bin/python2.7, Python 2.7.16, python-minimal, 2.7.16-1
SourcePackage: update-manager
Title: update-manager crashed with apt_pkg.Error in open(): E:can not open /var/lib/apt/lists/archive.canonical.com_ubuntu_dists_disco_InRelease - fopen (13: Permission denied), E:The package lists or status file could not be parsed or opened.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Cruz Fernandez (cruz-fernandez)]

My error is slightly similar:

E:can not open /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_focal-backports_InRelease - fopen (13: Permission denied), E:The package lists or status file could not be parsed or opened.