Created attachment 144386 [details] Screenshot describing the bug 1. Open discover 2. Wait until he discovers updates 3. The window is empty, impossible to do anything see the attachment
This means that a part of the application is broken, likely due to a botched update. Can you try to launch it using the command-line by typing `plasma-discover`? That should show the window and also print a bunch of text into your terminal window. Can you please paste the text here?
I've run plasma-discovery, then I clicked on the "Updates": adding empty sources model QStandardItemModel(0x5640c644ffa0) ** (process:5566): WARNING **: 07:22:34.623: Not changing AppStream cache location: No longer supported. QDir::mkpath: Empty or null file name 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 property "value" file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/RefreshableScrollView.qml:175:13: QML Binding: Not restoring previous value because restoreMode has not been set. This behavior is deprecated. You have to import QtQml 2.15 after any QtQuick imports and set the restoreMode of the binding to fix this warning. In Qt < 6.0 the default is Binding.RestoreBinding. In Qt >= 6.0 the default is Binding.RestoreBindingOrValue. file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/BasicListItem.qml:261:18: QML QQuickItem*: Binding loop detected for property "implicitWidth" file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/RefreshableScrollView.qml:175:13: QML Binding: Not restoring previous value because restoreMode has not been set. This behavior is deprecated. You have to import QtQml 2.15 after any QtQuick imports and set the restoreMode of the binding to fix this warning. In Qt < 6.0 the default is Binding.RestoreBinding. In Qt >= 6.0 the default is Binding.RestoreBindingOrValue. took really long to fetch PackageKitBackend(0x5640c63a0cc0) <<--- I CLICKED ON UPDATES BUTTON QQmlComponent: Component is not ready file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/PageRow.qml:813: Error: Error while loading page: qrc:/qml/UpdatesPage.qml:94 Type TextArea unavailable file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls.2/org.kde.desktop/TextArea.qml:15 module "org.kde.sonnet" is not installed
Ah, this is a Neon packaging issue. You can fix it by installing qml-module-org-kde-sonnet manually, if you haven't gotten an update that fixe sit yet. *** This bug has been marked as a duplicate of bug 446555 ***