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.