When I turned on my Manjaro KDE desktop today, the panel/taskbar has completely disappeared and I cannot right-click the desktop. I am still able to run Yakuke so that I am able to access a terminal, but when I run applications from it, they have the kind of lag that leaves behind dozens of copies of the same window. When I close the window, it stays on the screen.
I have updated my system with pacman and tried several solutions online, including a similar yet old superuser post (who's contributors are no longer active), though none of the solutions worked for me. I am happy to provide any additional output if necessary.
Here is the output when I run plasmashell from the terminal:
$ plasmashell Icon theme "ubuntu-mono-dark" not found. invalid metadata "/usr/lib/qt/plugins/kfileaudiopreview.so" invalid metadata "/usr/lib/qt/plugins/jpegthumbnail.so" invalid metadata "/usr/lib/qt/plugins/icon_mode.so" invalid metadata "/usr/lib/qt/plugins/krunner_shell.so" invalid metadata "/usr/lib/qt/plugins/fileviewdropboxplugin.so" invalid metadata "/usr/lib/qt/plugins/djvuthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_runcommand_config.so" invalid metadata "/usr/lib/qt/plugins/rawthumbnail.so" invalid metadata "/usr/lib/qt/plugins/gsthumbnail.so" invalid metadata "/usr/lib/qt/plugins/imagethumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_clock.so" invalid metadata "/usr/lib/qt/plugins/powerdevilwirelesspowersavingaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_nic.so" invalid metadata "/usr/lib/qt/plugins/kcm_hotkeys.so" invalid metadata "/usr/lib/qt/plugins/fileviewbazaarplugin.so" invalid metadata "/usr/lib/qt/plugins/opendocumentthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphinviewmodes.so" invalid metadata "/usr/lib/qt/plugins/kio_fonts.so" invalid metadata "/usr/lib/qt/plugins/kritathumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_ssl.so" invalid metadata "/usr/lib/qt/plugins/krunner_plasma-desktop.so" invalid metadata "/usr/lib/qt/plugins/kcm_kscreen.so" invalid metadata "/usr/lib/qt/plugins/kcm_sddm.so" invalid metadata "/usr/lib/qt/plugins/attica_kde.so" invalid metadata "/usr/lib/qt/plugins/krunner_converter.so" invalid metadata "/usr/lib/qt/plugins/kcm_plasmasearch.so" invalid metadata "/usr/lib/qt/plugins/sambausershareplugin.so" invalid metadata "/usr/lib/qt/plugins/kio_msits.so" invalid metadata "/usr/lib/qt/plugins/kcm_desktoppaths.so" invalid metadata "/usr/lib/qt/plugins/krunner_locations.so" invalid metadata "/usr/lib/qt/plugins/kcmspellchecking.so" invalid metadata "/usr/lib/qt/plugins/gvpart.so" invalid metadata "/usr/lib/qt/plugins/krunner_spellcheck.so" invalid metadata "/usr/lib/qt/plugins/kcm_smserver.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwallet5.so" invalid metadata "/usr/lib/qt/plugins/kcm_kdeconnect.so" invalid metadata "/usr/lib/qt/plugins/comicbookthumbnail.so" invalid metadata "/usr/lib/qt/plugins/windowsexethumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_systemd.so" invalid metadata "/usr/lib/qt/plugins/krunner_kill.so" invalid metadata "/usr/lib/qt/plugins/windowsimagethumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_standard_actions.so" invalid metadata "/usr/lib/qt/plugins/kcm_style.so" invalid metadata "/usr/lib/qt/plugins/kcm_keys.so" invalid metadata "/usr/lib/qt/plugins/kcm_opengl.so" invalid metadata "/usr/lib/qt/plugins/fontthumbnail.so" invalid metadata "/usr/lib/qt/plugins/exrthumbnail.so" invalid metadata "/usr/lib/qt/plugins/textthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kwincompositing.so" invalid metadata "/usr/lib/qt/plugins/krunner_datetime.so" invalid metadata "/usr/lib/qt/plugins/kcm_view1394.so" invalid metadata "/usr/lib/qt/plugins/kcm_pci.so" invalid metadata "/usr/lib/qt/plugins/kcm_baloofile.so" invalid metadata "/usr/lib/qt/plugins/powerdevildimdisplayaction_config.so" invalid metadata "/usr/lib/qt/plugins/krunner_webshortcuts.so" invalid metadata "/usr/lib/qt/plugins/libkcm_device_automounter.so" invalid metadata "/usr/lib/qt/plugins/kcm_fontinst.so" invalid metadata "/usr/lib/qt/plugins/krunner_bookmarksrunner.so" invalid metadata "/usr/lib/qt/plugins/kded_touchpad.so" invalid metadata "/usr/lib/qt/plugins/kcm_emoticons.so" invalid metadata "/usr/lib/qt/plugins/kcm_webshortcuts.so" invalid metadata "/usr/lib/qt/plugins/user_manager.so" invalid metadata "/usr/lib/qt/plugins/kcm_autostart.so" invalid metadata "/usr/lib/qt/plugins/kcm_memory.so" invalid metadata "/usr/lib/qt/plugins/kcm_trash.so" invalid metadata "/usr/lib/qt/plugins/powerdevilkeyboardbrightnesscontrolaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_metalinkfactory.so" invalid metadata "/usr/lib/qt/plugins/msm_timedate.so" invalid metadata "/usr/lib/qt/plugins/kfontviewpart.so" invalid metadata "/usr/lib/qt/plugins/kstyle_oxygen_config.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_pausemusic_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_keyboard.so" invalid metadata "/usr/lib/qt/plugins/svgthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kded_printmanager.so" invalid metadata "/usr/lib/qt/plugins/krunner_services.so" invalid metadata "/usr/lib/qt/plugins/appimagethumbnail.so" invalid metadata "/usr/lib/qt/plugins/msm_locale.so" invalid metadata "/usr/lib/qt/plugins/kstyle_breeze_config.so" invalid metadata "/usr/lib/qt/plugins/krunner_konsoleprofiles.so" invalid metadata "/usr/lib/qt/plugins/kcm_powerdevilglobalconfig.so" invalid metadata "/usr/lib/qt/plugins/kcm_networkmanagement.so" invalid metadata "/usr/lib/qt/plugins/powerdevildpmsaction.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphingeneral.so" invalid metadata "/usr/lib/qt/plugins/kio_obexftp.so" invalid metadata "/usr/lib/qt/plugins/kio_bluetooth.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_share_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_spellcheck.so" invalid metadata "/usr/lib/qt/plugins/msm_kernel.so" invalid metadata "/usr/lib/qt/plugins/krunner_recentdocuments.so" invalid metadata "/usr/lib/qt/plugins/kcm_about_distro.so" invalid metadata "/usr/lib/qt/plugins/powerdevildpmsaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_solid_actions.so" invalid metadata "/usr/lib/qt/plugins/krunner_charrunner.so" invalid metadata "/usr/lib/qt/plugins/krunner_windowedwidgets.so" invalid metadata "/usr/lib/qt/plugins/kcm_printer_manager.so" invalid metadata "/usr/lib/qt/plugins/kcm_info.so" invalid metadata "/usr/lib/qt/plugins/kcm_samba.so" invalid metadata "/usr/lib/qt/plugins/kcm_kgamma.so" invalid metadata "/usr/lib/qt/plugins/plasma-geolocation-gps.so" invalid metadata "/usr/lib/qt/plugins/krunner_sessions.so" invalid metadata "/usr/lib/qt/plugins/msm_language_packages.so" invalid metadata "/usr/lib/qt/plugins/kcm_activities.so" invalid metadata "/usr/lib/qt/plugins/kcm_joystick.so" invalid metadata "/usr/lib/qt/plugins/ffmpegthumbs.so" invalid metadata "/usr/lib/qt/plugins/okularpart.so" invalid metadata "/usr/lib/qt/plugins/ebookthumbnail.so" invalid metadata "/usr/lib/qt/plugins/krunner_dictionary.so" invalid metadata "/usr/lib/qt/plugins/kget_browser_integration.so" invalid metadata "/usr/lib/qt/plugins/dolphinpart.so" invalid metadata "/usr/lib/qt/plugins/krunner_powerdevil.so" invalid metadata "/usr/lib/qt/plugins/plasma-geolocation-ip.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_mmsfactory.so" invalid metadata "/usr/lib/qt/plugins/powerdevilhandlebuttoneventsaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwintabbox.so" invalid metadata "/usr/lib/qt/plugins/kdeconnect_sendnotifications_config.so" invalid metadata "/usr/lib/qt/plugins/fileviewsvnplugin.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwinoptions.so" invalid metadata "/usr/lib/qt/plugins/libkcm_qtquicksettings.so" invalid metadata "/usr/lib/qt/plugins/krunner_katesessions.so" invalid metadata "/usr/lib/qt/plugins/mltpreview.so" invalid metadata "/usr/lib/qt/plugins/kcm_usb.so" invalid metadata "/usr/lib/qt/plugins/kcm_phonon.so" invalid metadata "/usr/lib/qt/plugins/powerdevilbrightnesscontrolaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_kill.so" invalid metadata "/usr/lib/qt/plugins/blenderthumbnail.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_charrunner.so" invalid metadata "/usr/lib/qt/plugins/kcm_mouse.so" invalid metadata "/usr/lib/qt/plugins/kcm_kamera.so" invalid metadata "/usr/lib/qt/plugins/kcm_powerdevilprofilesconfig.so" invalid metadata "/usr/lib/qt/plugins/kdeconnectfileitemaction.so" invalid metadata "/usr/lib/qt/plugins/kcm_powerdevilactivitiesconfig.so" invalid metadata "/usr/lib/qt/plugins/kcm_kio.so" invalid metadata "/usr/lib/qt/plugins/libplasmanetworkmanagement_openconnectui.so" invalid metadata "/usr/lib/qt/plugins/kcm_filetypes.so" invalid metadata "/usr/lib/qt/plugins/powerdevilsuspendsessionaction_config.so" invalid metadata "/usr/lib/qt/plugins/kcm_kded.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_multisegkiofactory.so" invalid metadata "/usr/lib/qt/plugins/kstyle_qtcurve5_config.so" invalid metadata "/usr/lib/qt/plugins/fileviewhgplugin.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwin_scripts.so" invalid metadata "/usr/lib/qt/plugins/miloutextplugin.so" invalid metadata "/usr/lib/qt/plugins/baloofilepropertiesplugin.so" invalid metadata "/usr/lib/qt/plugins/msm_keyboard.so" invalid metadata "/usr/lib/qt/plugins/audiothumbnail.so" invalid metadata "/usr/lib/qt/plugins/fileviewgitplugin.so" invalid metadata "/usr/lib/qt/plugins/krunner_calculatorrunner.so" invalid metadata "/usr/lib/qt/plugins/krunner_windows.so" invalid metadata "/usr/lib/qt/plugins/msm_mhwd.so" invalid metadata "/usr/lib/qt/plugins/krunner_kwin.so" invalid metadata "/usr/lib/qt/plugins/powerdevilrunscriptaction_config.so" invalid metadata "/usr/lib/qt/plugins/krunner_appstream.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwinrules.so" invalid metadata "/usr/lib/qt/plugins/kcm_krunner_dictionary.so" invalid metadata "/usr/lib/qt/plugins/kcm_componentchooser.so" invalid metadata "/usr/lib/qt/plugins/kcm_access.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwinscreenedges.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphinnavigation.so" invalid metadata "/usr/lib/qt/plugins/classic_mode.so" invalid metadata "/usr/lib/qt/plugins/systemsettings_sidebar_mode.so" invalid metadata "/usr/lib/qt/plugins/krunner_activities.so" invalid metadata "/usr/lib/qt/plugins/msm_users.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_checksumsearchfactory.so" invalid metadata "/usr/lib/qt/plugins/kcm_devinfo.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_mirrorsearchfactory.so" invalid metadata "/usr/lib/qt/plugins/krunner_placesrunner.so" invalid metadata "/usr/lib/qt/plugins/kcm_kwintouchscreen.so" invalid metadata "/usr/lib/qt/plugins/kcm_kget_bittorrentfactory.so" invalid metadata "/usr/lib/qt/plugins/kio_kamera.so" invalid metadata "/usr/lib/qt/plugins/kcm_dolphinservices.so" org.kde.plasmaquick: Applet preload policy set to 1 file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList trying to show an empty dialog file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList file:///usr/share/plasma/wallpapers/org.kde.image/contents/ui/main.qml:71:9: Unable to assign [undefined] to QStringList trying to show an empty dialog file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19: QML Loader: Binding loop detected for property "height" file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:302:17: QML QQuickText: Binding loop detected for property "width" file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:302:17: QML QQuickText: Binding loop detected for property "width" file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:302:17: QML QQuickText: Binding loop detected for property "width" Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) Both point size and pixel size set. Using pixel size. Both point size and pixel size set. Using pixel size. Both point size and pixel size set. Using pixel size. trying to show an empty dialog trying to show an empty dialog libkcups: CUPS-Get-Printers last error: 0 successful-ok libkcups: Create-Printer-Subscriptions last error: 0 successful-ok libkcups: Get-Jobs last error: 0 successful-ok libkcups: Get-Jobs last error: 0 successful-ok Plasma Shell startup completed libkcups: 3 "Brother_MFC-J285DW" libkcups: 5 "Canon_MG5500_series" libkcups: 3 KCrash: Attempting to start /usr/bin/plasmashell from kdeinit sock_file=/run/user/1000/kdeinit5__0 QSocketNotifier: Invalid socket 8 and type 'Read', disabling... QSocketNotifier: Invalid socket 9 and type 'Read', disabling... QSocketNotifier: Invalid socket 51 and type 'Read', disabling... KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = plasmashell path = /usr/bin pid = 4113 KCrash: Arguments: /usr/bin/plasmashell Segmentation fault (core dumped)