Carousel Isn't Spinning

I love the Oria theme. I have everything set up and it looks great. However, the carousel isn’t spinning. The left and right arrow on top of the carousel is missing from it. This is the theme preview https://wordpress.org/themes/oria/ — mine doesn’t have the arrows and the carousel isn’t moving at all. I haven’t published my site yet so I can’t give the link since it will just say “coming soon.”

Can you please advise what I should do to make this spin and to return the arrows. Thanks.