setGeometry: unable to set geometry

`setGeometry()` is a method in Qt that sets the size and position of a widget. The error "unable to set geometry" usually occurs when the widget's position or size cannot be set for some reason.

Here are some possible reasons for this error:

1. The widget has not been fully initialized yet. Ensure that all required initialization has been completed before calling `setGeometry()`.

2. The widget's parent does not have a layout. If the parent widget does not have a layout, it may not be possible to set the geometry of the child widget.

3. The widget's position or size is outside the visible area of the screen. Ensure that the position and size of the widget are within the visible area of the screen.

4. The widget is not visible. If the widget is not visible, you may not be able to set its geometry. Ensure that the widget is visible before setting its geometry.

5. The widget is not a top-level widget. Only top-level widgets can be moved and resized. Ensure that the widget is a top-level widget before calling `setGeometry()`.