LayerSlider encountered a problem while it tried to show your slider.Please make sure that you've used the right shortcode or method to insert the slider, and check if the corresponding slider exists and it wasn't deleted previously.
Carousel & Alt Section
With carousel shortcode you can make a carousel of several images, you just have to put carousel items inside carousel shortcode. With Alt Section shortcode you can create an area with different color. Useful, isn’t it?