You do not have a link list with a handle set to kujnski-proizvodi-kuferi-dom-gradina, or you do and it's empty. Go ahead and create a link list called Кујнски производи, куфери, дом и градина on your Navigation page and populate that link list with links that point to collections, to see collections listed here. Make sure the link list also has a handle set to kujnski-proizvodi-kuferi-dom-gradina.