Pitch Black Desktop ( without Taskbar ) after applying a Global Theme

I tried it with multiple distros ( Fedora / Arch / Ubuntu … ) and with the latest KDE Plasma.
If I go to “Get New” in the System Settings → Global Themes to Download a new Theme and I download Utterly Sweet,
the Desktop becomes pitch black without a Taskbar as soon as apply the newly downloaded Theme.

I executed systemsettings from a terminal to see what’s happening:

qrc:/kcm/kcm_lookandfeel/main.qml:144:5: QML OverlaySheet: Binding loop detected for property “implicitHeight”:
file:///usr/lib64/qt6/qml/org/kde/kirigami/templates/OverlaySheet.qml:132:5
qrc:/kcm/kcm_lookandfeel/main.qml:144:5: QML OverlaySheet: Binding loop detected for property “implicitHeight”:
file:///usr/lib64/qt6/qml/org/kde/kirigami/templates/OverlaySheet.qml:132:5
qrc:/kcm/kcm_lookandfeel/main.qml:144:5: QML OverlaySheet: Binding loop detected for property “implicitHeight”:
file:///usr/lib64/qt6/qml/org/kde/kirigami/templates/OverlaySheet.qml:132:5

switching back to breeze does not fix it?

click on the desktop, type “global” and go to the settings page

change it back to breeze and apply

not all themes are plasma 6 ready so it’s a crap shoot when you hit the “Get New” button… realize these are 3rd party products, not KDE products

you can try contacting the 3rd party developer directly to see if/when they will be updated.

If I switch back to breeze, the dark background goes away. Thanks, but that’s not a solution because I want to apply “Utterly Sweet” and use it.

As you can see the LOG show Qt specific errors.
Furthermore: Any kind of Global Theme I tried produced a Pitch Black Desktop … earlier it was working.

So this is surely a bug.

Utterly sweet seems to be a plasma 5-ish (kvantum) theme.

I checked with everything ( kvantum, colors, aurorae and plasma) separate.

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you will need to contact the developer and find out what versions the theme supports.

the solution may be that you have to either install a different version of plasma or reduce your expectations about theming.

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Thank you! I will contact the developer.

I stand corrected. There seems to be a plasma 6 version: https://store.kde.org/p/2133021

Maybe you tried the wrong version. In either case, might I suggest you install everything separately? Not as global global theme that is.

Now I tried installing the Plasma 6 version as a tar.gz and it turns everything Pitch Black first but after a reboot it works fine. So the only problem is the “pitch black” thing. Please take a look at the attached LOG. It shows some Qt-specific issues in two files: OverlaySheet.qml and main.qml. I think this is either a KDE-specific or a Qt6-specific issue …

I don’t think I tried the wrong version. System Settings will Download and Install the latest (compatible) version if you do this on the GUI.

In all this time I never installed a global theme. I prefer my own stuff anyway. But. I’ve seen some weird stuff in those third party theming stuff. Especially those that come with scripts. And this one has some like, for example, the window buttons applet ( which contain a “main.qml”) That’s why I suggested to install everything separately. But hey, you have it working.

This is a known bug: 498175 – Desktop goes black and panels disappear when changing the global theme with "Desktop and window layout selected", until plasmashell is restarted