[Plugin: WP-dTree] Plugin is not working.

I have a problem with WP-dTree. It’s not working at all. Layout was prepared and tested on my localhost server and everything was O.K. and plugin was running. When I moved layout on web server (webhost) with same WP-dTree settings it’s not working at all. I use only Categories and Archives.
I can’t find any reason why it’s not running.

Please help.

Link for my site with broken plugin: https://www.aniaikrzysiek.com.pl/o_nas/.

PS Sorry for my english. I hope you can understand me ??