Hi,this means QUiLoader cannot find/load the C++ plugin with the Python custom widget. You don't want this machinery in your application though; please use pyside6-uic
as described in "Option A: Generating a Python class" https://doc.qt.io/qtforpython-6/tutorials/basictutorial/uifiles.html .
Regards, Friedemann -- Friedemann Kleint The Qt Company GmbH _______________________________________________ PySide mailing list PySide@qt-project.org https://lists.qt-project.org/listinfo/pyside