Add Slider!?

Well, how do I add slider to this theme? I don’t get that. I can’t find any information about that.

I have a template that are right, that in sidebar 1 it’s the spot where the slider shall be.

In Widgets I found a widget named “Kopa sequence slider: slider”
I put it into the sidebar 1.

But there is nothing to select at all, it says catogories but it’s empty.