Can’t to manage slides

Hi.

I’m using enrollment pro theme. I can’t to manage slides. When I try to change, delete or add slides, the site doesn’t work.

If I use the arrow button to expand the collaps, its doesn’t works. If I use add button to create a new slide, it doesn’t add a slide.

I inspected the code in my browser to change display propety of collapse. I changed it from display:none to inherid. I saw the slide options, but I couldn´t to remove or edit something.