Why doesn't the slide appear?

Question

Layout

When I set a height of 100% for a slide, it disappears, but as soon as I set the height in px, it appears. Since it would be more correct to write through% interested in this option. Screenshots attached.

Answer 1

This often happens with slick. I also recommend reading how 100% works in CSS.
Well, in this situation, either use max-width and then 100% will work. Or Slide into another wrapper from div to insert