How to set controls back to normal after mouse cursor is hidden again?

At the moment I am using the First Person Character template and having some trouble with the controls.

When I click a widget the mouse cursor is shown and the mouse cursor disappears when the cursor is closed. This all works like it should.

The red crosshair is still visible on screen, like it should. But the controls have completely changed and you cannot look around anymore with the camera by simply moving your mouse.
Only “dragging” the camera by holding either the left or right mouse button down.

How do I set the controls back so you are able to have the same controls as you had at the beginning of play (moving the camera by simple movement of the mouse?

I followed the tutorial by Wes Bunn (Content Creator at Epic Games)

(Drag and drop with UMG)

Thanks in advance!