software-properties-gtk is blank when run as normal user.

[Solitaire]

lsb_release -rd
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04

Upgraded install from 19.10

"Software & Updates" windows is blank when initiated from either the terminal or via the "Settings..." button in the "Software Updater".

If I run "software-properties-gtk" in the terminal the window is also blank.
If I run it with sudo the "Software and Updates" window opens as normal.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: software-properties-gtk 0.98.7
ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
Uname: Linux 5.4.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Mar 22 21:30:12 2020
InstallationDate: Installed on 2019-12-15 (98 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
PackageArchitecture: all
SourcePackage: software-properties
UpgradeStatus: Upgraded to focal on 2020-03-22 (0 days ago)

[Launchpad Janitor (janitor)]

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

[Kiruahxh (kiruahxh)]

Since I updated the source.list with software-properties-gtk after the migration to eoan, software-properties-gtk refuses to be launched from gnome shell.
However, sudo software-properties-gtk works.

For information, I also had a non utf8 character in /var/lib/dpkg/status

[Daniele (daniele-godi)]

I had the same problem, after the upgrade from 18.04 to 20.04.1 it it opens correctly.
Then I removed some useless repositories and when updating the list the software hung and I had to force its closing.
After that it opens only with root permissions (sudo software-properties-gtk).

[Sebastien Bacher (seb128)]

Thank you for your bug report, could you add your 'journalctl -b 0' after getting the issue?

[Cay Horstmann (cay)]

I have the same problem after updating to 20.04.1. An empty window shows up when I launch software-properties-gtk, but sudo software-properties-gtk works ok. I renamed /etc/apt/sources.list.d so that presumably its contents won't be parsed. Below is my /etc/apt/sources.lst.

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://de.archive.ubuntu.com/ubuntu/ focal main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://de.archive.ubuntu.com/ubuntu/ focal-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://de.archive.ubuntu.com/ubuntu/ focal universe
deb http://de.archive.ubuntu.com/ubuntu/ focal-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://de.archive.ubuntu.com/ubuntu/ focal multiverse
deb http://de.archive.ubuntu.com/ubuntu/ focal-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://de.archive.ubuntu.com/ubuntu/ focal-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 focal partner
deb-src http://archive.canonical.com/ubuntu focal partner

deb http://security.ubuntu.com/ubuntu focal-security main restricted
deb http://security.ubuntu.com/ubuntu focal-security universe
deb http://security.ubuntu.com/ubuntu focal-security multiverse

[Launchpad Janitor (janitor)]

[Expired for software-properties (Ubuntu) because there has been no activity for 60 days.]