I'd installed recommended plugins and loaded demo content.
Demo content was loaded with mistake: [WARNING] Failed to import wpsisac_slider-category homepage
When I started to investigate that issue, I found that my site is out of slider. I think that has to be Revolution Slider, but it isn't in list of recommended plugin.
I also was tried to use FDL Silk Slider but it doesn't give opportunities to change its content.
So how to set editable slider to homepage?