My slider is vertical

Hi, as you can see on my page, the slider’s orientation is vertical but I wanted it to be horizontal.
The code I wrote is this:
[wpb-product-slider product_type=”category” category=”100″ autoplay=”true” loop=”true” nav=”true” pagination=”false” items_desktop_small=”4″ items_tablet=”2″ items_mobile=”1″ show_cart=”on” show_price=”on”]

What’s wrong? Up until a week ago it was fine

The page I need help with: [log in to see the link]