Slider overlap text since update

I run my side since years with the free version without problems, but one of the last updates the slider wrecked my side by overlapping al the text. So I buy the Pro version with the hope of more influence top fix that. But still the same. The slider does not slide and shows only the picture of the first page. Currently i have disabled the slider on https://reitverein-leonberg.de so you see the text. The slider should look like this: Homepage only / horizontal scroll / 3/1 sec / Loader rigth, page / num pages 9 The first page to show is https://reitverein-leonberg.de/wp/start/unser-verein/ All of the page images are 1200x500. What goes wrong? Best Regards Roland