Why isn't the slideshow and testimonies working on mobile in debut theme?

Store Design
1

Hello, I use debut theme but the slideshow and the testimonies on my website don’t work on mobile.

Can somebody help ?

The website is xtended.fr

2

@Mossiah ,

Add one more testimonial or slide image… then check…

3

I already have 6 images and 3 testimonials. Independently of what I add I does not work.