I can see your problem: the configure button of the LCD Weather station has popped up under the Clementine and Firefox icons.
I was also able to replicate it -- with a twist: on my box it popped up under the cashew, which made it very hard to use or move. (I managed to remove it by right-clicking the outer edge of it; if I clicked just a pixel or two to the right, the click went to the cashew.)
I don't have a solution, but you could try to use another weather widget instead. The one named Weather Forcast seems to work, and there used to be plenty of them on kde-look.org.