1. Have a broken applet on the panel. It shows up as "Unknown" with "Error loading the widget. Package does not exist"
2. Right click on it
3. Configure "Unknown"

#0  0x00007f182098b401 in Plasma::Corona::kPackage() const (this=0x0) at /home/nico/kde6/src/plasma-framework/src/plasma/corona.cpp:58
#1  0x00007f1820cb11dc in PlasmaQuick::ConfigView::init() (this=0x3545580) at /home/nico/kde6/src/plasma-framework/src/plasmaquick/configview.cpp:333
#2  0x000000000044056c in PanelView::showConfigurationInterface(Plasma::Applet*) (this=0x7f17fc004940, applet=<optimized out>) at /home/nico/kde6/src/plasma-workspace/shell/panelview.cpp:770
#3  0x00007f181d1ddcd4 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7ffe3f7148b0, r=0x7f17fc004940, this=0x22ffe40)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobjectdefs_impl.h:363
#4  doActivate<false>(QObject*, int, void**) (sender=0x12cd760, signal_index=36, argv=0x7ffe3f7148b0) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:3992
#5  0x00007f181d1d4757 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    (sender=<optimized out>, m=m@entry=0x7f18209ee200, local_signal_index=local_signal_index@entry=10, argv=argv@entry=0x7ffe3f7148b0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:4052
#6  0x00007f182097c752 in Plasma::Containment::configureRequested(Plasma::Applet*) (this=<optimized out>, _t1=<optimized out>)
    at /home/nico/kde6/build/plasma-framework/src/plasma/KF6Plasma_autogen/include/moc_containment.cpp:1002
#7  0x00007f181d1ddcd4 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7ffe3f7149c0, r=0x14953d0, this=0x149f1b0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobjectdefs_impl.h:363
#8  doActivate<false>(QObject*, int, void**) (sender=0x14953d0, signal_index=36, argv=0x7ffe3f7149c0) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:3992
#9  0x00007f181d1d4757 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    (sender=<optimized out>, m=m@entry=0x7f18209ee200, local_signal_index=local_signal_index@entry=10, argv=argv@entry=0x7ffe3f7149c0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:4052
#10 0x00007f182097c752 in Plasma::Containment::configureRequested(Plasma::Applet*) (this=<optimized out>, _t1=<optimized out>)
    at /home/nico/kde6/build/plasma-framework/src/plasma/KF6Plasma_autogen/include/moc_containment.cpp:1002
#11 0x00007f181d1de248 in doActivate<false>(QObject*, int, void**) (sender=0x151ce20, signal_index=7, argv=0x7ffe3f714ad0) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:4004
#12 0x00007f181d1d4757 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    (sender=sender@entry=0x151ce20, m=m@entry=0x7f181e10c5c0, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x7ffe3f714ad0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:4052
#13 0x00007f181de195a4 in QAction::triggered(bool) (this=this@entry=0x151ce20, _t1=<optimized out>)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/redhat-linux-build/src/gui/Gui_autogen/include/moc_qaction.cpp:638
#14 0x00007f181de1c6eb in QAction::activate(QAction::ActionEvent) (this=0x151ce20, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/gui/kernel/qaction.cpp:1104
#15 0x00007f181eba2324 in QMenuPrivate::activateCausedStack(QList<QPointer<QWidget> > const&, QAction*, QAction::ActionEvent, bool)
    (this=0x4e68730, causedStack=..., action=0x151ce20, action_e=QAction::Trigger, self=<optimized out>) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/widgets/qmenu.cpp:1396
#16 0x00007f181ebaa720 in QMenuPrivate::activateAction(QAction*, QAction::ActionEvent, bool) (this=0x4e68730, action=0x151ce20, action_e=QAction::Trigger, self=<optimized out>)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/widgets/qmenu.cpp:1478
#17 0x00007f181ea1d8e0 in QWidget::event(QEvent*) (this=0x35a9670, event=0x7ffe3f7151e0) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qwidget.cpp:9317
#18 0x00007f181e9c0b08 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0xd23330, receiver=receiver@entry=0x35a9670, e=e@entry=0x7ffe3f7151e0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qapplication.cpp:3287
#19 0x00007f181e9cab66 in QApplication::notify(QObject*, QEvent*) (this=<optimized out>, receiver=0x35a9670, e=<optimized out>)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qapplication.cpp:2774
#20 0x00007f181d17c308 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x35a9670, event=0x7ffe3f7151e0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1115
#21 0x00007f181d17c51d in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) (receiver=<optimized out>, event=<optimized out>)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1547
#22 0x00007f181e9c956e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool)
    (receiver=0x35a9670, event=event@entry=0x7ffe3f7151e0, alienWidget=0x0, nativeWidget=0x35a9670, buttonDown=buttonDown@entry=0x7f181efb8830 <qt_button_down>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qapplication.cpp:2358
#23 0x00007f181ea31673 in QWidgetWindow::handleMouseEvent(QMouseEvent*) (this=0x3607c50, event=event@entry=0x7ffe3f7154a0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qwidgetwindow.cpp:519
#24 0x00007f181ea33ab0 in QWidgetWindow::event(QEvent*) (this=0x3607c50, event=0x7ffe3f7154a0) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qwidgetwindow.cpp:241
#25 0x00007f181e9c0b08 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x3607c50, e=0x7ffe3f7154a0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qapplication.cpp:3287
#26 0x00007f181d17c308 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x3607c50, event=0x7ffe3f7154a0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1115
#27 0x00007f181d17c51d in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) (receiver=<optimized out>, event=<optimized out>)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1547
#28 0x00007f181da09017 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) (e=0x7f1800003e20)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/gui/kernel/qguiapplication.cpp:2285
--Type <RET> for more, q to quit, c to continue without paging--c
#29 0x00007f181da6339c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) (flags=...)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/gui/kernel/qwindowsysteminterface.cpp:1094
#30 0x00007f181df43964 in userEventSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/gui/platform/unix/qeventdispatcher_glib.cpp:38
#31 0x00007f181c4eb48c in g_main_dispatch (context=0x7f1804000f10) at ../glib/gmain.c:3460
#32 g_main_context_dispatch (context=0x7f1804000f10) at ../glib/gmain.c:4200
#33 0x00007f181c549638 in g_main_context_iterate.isra.0 (context=0x7f1804000f10, block=1, dispatch=1, self=<optimized out>) at ../glib/gmain.c:4276
#34 0x00007f181c4e8b13 in g_main_context_iteration (context=0x7f1804000f10, may_block=1) at ../glib/gmain.c:4343
#35 0x00007f181d41ff7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xd53810, flags=...)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:393
#36 0x00007f181d188e93 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe3f7158c0, flags=..., flags@entry=...)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/global/qflags.h:34
#37 0x00007f181d184b3d in QCoreApplication::exec() () at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/global/qflags.h:74
#38 0x00007f181d9f85cd in QGuiApplication::exec() () at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/gui/kernel/qguiapplication.cpp:1894
#39 0x00007f181e9c0a79 in QApplication::exec() () at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qapplication.cpp:2566
#40 0x0000000000424fc0 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /home/nico/kde6/src/plasma-workspace/shell/main.cpp:242

KDE Plasma Version: master
KDE Frameworks Version: master
Qt Version: 6.5.1