Bug 449588

After recent update it  can't be run. The main window briefly shows up (just flashes) then disappear. Happens every time but it is possible to launch it as root.

 When I launch it as normal user  from console it shows this:

plasma-discover <enter>

adding empty sources model QStandardItemModel(0x55f4daec0a70)
org.kde.plasma.libdiscover: Couldn't find a category for  "fwupd-backend"
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/PrivateActionToolButton.qml:74:5: QML Binding: Binding loop detected for prop
erty "value"
kf.newstuff.core: "Error transferring https://distribute.kde.org/khotnewstuff/fonts-providers.xml - server replied: Not Found"
KNS error in "Fonts" : KNSCore::ProviderError "Loading of providers from file: https://distribute.kde.org/khotnewstuff/fonts-providers.xml failed
" QVariant(QString, "https://distribute.kde.org/khotnewstuff/fonts-providers.xml")
invalid kns backend! "/usr/share/knsrcfiles/kfontinst.knsrc" because: "Invalid Fonts backend, contact your distributor."
org.kde.plasma.libdiscover: Discarding invalid backend "kfontinst.knsrc"
kns error "/usr/share/knsrcfiles/kfontinst.knsrc" "Invalid Fonts backend, contact your distributor."
org.kde.plasma.libdiscover: Couldn't find a category for  "fwupd-backend"
QOpenGLFunctions created with non-current context

KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = plasma-discover path = /usr/bin pid = 59065
KCrash: Arguments: /usr/bin/plasma-discover  
The Wayland connection experienced a fatal error: Bad file descriptor
kf.kio.slaves.file: readData() returned -1


SOFTWARE/OS VERSIONS

Operating System: KDE neon 5.23
KDE Plasma Version: 5.23.5
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.3
Kernel Version: 5.13.0-28-generic (64-bit)
Graphics Platform: Wayland
Processors: 6 × AMD Ryzen 5 4500U with Radeon Graphics
Memory: 7,1 GiB of RAM
Graphics Processor: AMD RENOIR

Possible workaround:  install updates from console with: "pkcon update" or run Discover as root.