SlideDeck2 LT problem

Hi there, I’m working on the site https://fachowabudowa.pl/, it uses Basic theme from Elegant Themes.

I needed a nice slider so I installed SlideDeck2 LT which looks very cool but unfortunately does not work properly.

As you can see on the mentioned site, after clicking tabs on the bottom of the slider for few times it stops changing slides.

Do you know what’s the reason and how I could fix it??

Will be grateful for help

Thx