A problem with HTML slider (text isn't displayed correctly)

Hello,

We bought Supsystic Slider Pro a couple days ago. I’d like to have it display a slider with some text, ideally with some HTML content. I followed the instructions on http://supsystic.com/html-support-example/, but it doesn’t seem to work.

The problem is I see the uploaded image at the correct position, but I don’t see the text and button added in HTML editor. When I view the page with Chrome DevTools, I see the divs with text and button way below the image. I made a screenshot with DevTools showing the location of text divs:

I think I double-checked everything in the slider settings and I’m not sure what to do.