- Ensure you’re capturing the mouse cursor on launch [Project Settings → Input → Viewport Properties]:
- The last node in you image sets the mode to UI only, meaning that the controller will be unable to process input; it also unlocks the mouse, meaning that the cursor can easily leave the viewport causing it to lose focus. Try it without this node, especially that you’re not feeding it any widgets at the moment.
edit: just saw the second image
Not really sure what you’re trying to accomplish. According to your Begin Play, you show a widget first and then set the mode to UI only. Once the widget is closed, you should be able to move again. Is it not working as intended?