[Bug 2018037] [NEW] Cannot configure Software Sources in Settings

[Gordon Lack]

Public bug reported:

If I open Discover (click on the Updates button in the System Tray) and select Settings then next to the Default source is a "Software Sources" button.
Hovering over this it says, "Configure the sources for installable software and updates"

Clicking on this is supposed to produce a new window allowing me to configure various things (based on pre-23.04 releases).
BUT this one does nothing.

Probably because of this:
==========
[gmllaptop]: pkexec /usr/bin/software-properties-qt
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl,
offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-
xcomposite-glx, xcb.

Aborted (core dumped)
==========

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: plasma-discover 5.27.4-0ubuntu1
ProcVersionSignature: Ubuntu 6.2.0-20.20-generic 6.2.6
Uname: Linux 6.2.0-20-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Fri Apr 28 22:59:23 2023
InstallationDate: Installed on 2022-06-23 (309 days ago)
InstallationMedia: Kubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
SourcePackage: plasma-discover
UpgradeStatus: Upgraded to lunar on 2023-04-28 (0 days ago)
mtime.conffile..etc.xdg.autostart.org.kde.discover.notifier.desktop: 2023-04-06T09:36:56

** Affects: plasma-discover (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lunar

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https://bugs.launchpad.net/bugs/2018037

Title:
  Cannot configure Software Sources in Settings

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