Hello, i'm using kde neon since 3 weeks ago. Atm i have a problem with Discover, it crashes without starting. I chose to execute it in Konsole:

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plasma-discover

QQmlApplicationEngine failed to load component
qrc:/qml/DiscoverWindow.qml:162 Cannot assign to non-existent property "showCloseButton"

Errors when loading the GUI
invalid kns backend! "/etc/xdg/servicemenu.knsrc" because: "Config group not found! Check your KNS3 installation."
invalid kns backend! "/etc/xdg/ksysguard.knsrc" because: "Config group not found! Check your KNS3 installation."
Discarding invalid backend "servicemenu.knsrc"
Discarding invalid backend "ksysguard.knsrc"
setting currentApplicationBackend PackageKitBackend(0xc2f7b0)


so i checked my theme settings and...
https://i.imgur.com/sR6G6r2.png
all my themes settings are literally EMPTY. There's nothing there.

When i try to change lockscreen settings it says:
https://i.imgur.com/YvXMw1P.png
even if this file exists. Any suggestions? this happened yesterday .

I have exactly the same problem. It started when Plasma was updated to 5.12.90. I suspect the bug is there and we'll just have to wait until it's fixed.

This bug Is related to kirigami package , if I not wrong.. it's used to render al new theme settings , but we have a wrong versión .
Hope neon team fix this in final versión.

bug reported on december 2017
https://bugs.kde.org/show_bug.cgi?id=387689

Strangiato wrote:bug reported on december 2017
https://bugs.kde.org/show_bug.cgi?id=387689

sudo apt-get install qml-module-org-kde-kcm doesn't seems to solve it.

matteor wrote:

Strangiato wrote:bug reported on december 2017
https://bugs.kde.org/show_bug.cgi?id=387689

sudo apt-get install qml-module-org-kde-kcm doesn't seems to solve it.

same on my two systems, Arch Linux and neon dev unstable.

Strangiato wrote:

matteor wrote:

Strangiato wrote:bug reported on december 2017
https://bugs.kde.org/show_bug.cgi?id=387689

sudo apt-get install qml-module-org-kde-kcm doesn't seems to solve it.

same on my two systems, Arch Linux and neon dev unstable.

it's probably showing up again because a new update . I hope they will fix that soon

The problem related here and in the bug report exists since some KDE software (plasma and/or frameworks) released on some date near the bug report date.
It never was fixed on my systems.
Edit: I use system settings in icon view mode instead sidebar view.

i find out "kcm_lookandfeel.so" is missing.

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/usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_lookandfeel.so

should be there. Any ideas how to replace it?

Problem solved with the new update. Bug was kirigami2 related.

Great, tanks to the dev to fix this. I mention before this package was the problem. I'm glad I do not have to reinstall.

Hi, I followed this post with real interest. I am trying to understand the role of Discover in KDE.
Some days ago the Discover program went off.
Today I run from terminal the following command:
plasma-discover
The program 'plasma-discover' is currently not installed. You can install it by typing:
sudo apt install plasma-discover

Should I really meed the program or it is enough running periodically pkcon refresh and pkcon update.
Obviously, I could not search for themes or any other KDE applications. But I could install an see them in the section system-settings. I tried to use plasma-discover until it disappeared and I could install programs but not themes.
I allso run the following command:
pkcon get-transactions > pkcon.log

I have uploaded the file in this link https://goo.gl/3FGeXx

I will appreciate some feedback because I am new using KDE Neon, although i have 15 years running Ubuntu at work. I think KDE Neon is the best of both worlds.