I installed the Plug, but cant use it. I need another Plugin for use it?
If i write /tree, it shows me the Tree´s.
But i cant buy anyone of them.
Says "havent enough,..."

I tried to reduce the scrap costs, but the same.

What do i wrong?

you dont have ecomonics which you need.

But i read nothing about i have to use the economics or rewards plugins. I thougt it will work with scrap to? 

Is there anybody who can help me out, please?

only works with econ no scrap