diff --git a/src/kcmoduleloader.cpp b/src/kcmoduleloader.cpp
--- a/src/kcmoduleloader.cpp
+++ b/src/kcmoduleloader.cpp
@@ -101,9 +101,13 @@
                 KQuickAddons::ConfigModule *cm = factory->create<KQuickAddons::ConfigModule>(nullptr, args2);
                 if (!cm) {
                     qWarning() << "Error creating object from plugin" << loader.fileName();
+                } else {
+                    if (!cm->mainUi()) {
+                        return reportError(report, i18n("Error loading QML file."), cm->errorString(), parent);
+                    }
+                    module = new KCModuleQml(cm, parent, args2);
+                    return module;
                 }
-                module = new KCModuleQml(cm, parent, args2);
-                return module;
             }
         }
 //#ifndef NDEBUG