Thank you for using the support forum for the queries. If you got the problem after editing the theme codes, please replace the theme folder with the original one. You can download the theme and replace it inside wp-content/themes folder. Hope this works for you.
Thanks for reply, but this theme was not changed through sources or CSS at all.
Here is the link to this demo site: https://goo.gl/9NqopG
How I can set: shall this columns overlay on slider or be right under it?
It is not correct – there are three columns and all of them linked to the normal pages: special offer, travel with us and about us.
Excerts were also created for this pages.
How i can setup the location of this columns: above slider or after slider? On photos in your documentation there are 2 types but how to do this?