diff --git a/src/qmlcontrols/kcmcontrols/qml/GridDelegate.qml b/src/qmlcontrols/kcmcontrols/qml/GridDelegate.qml
--- a/src/qmlcontrols/kcmcontrols/qml/GridDelegate.qml
+++ b/src/qmlcontrols/kcmcontrols/qml/GridDelegate.qml
@@ -108,7 +108,7 @@
                 anchors.centerIn: parent
                 width: Kirigami.Units.iconSizes.large
                 height: width
-                source: pluginName === "None" ? "edit-none" : "view-preview"
+                source: typeof pluginName === "string" && pluginName === "None" ? "edit-none" : "view-preview"
             }
         }