JS error on editing slides in Revolution slider

Hi,

I’ve got a problem I’ve never met before. I installed Your theme, uploaded demo and wanted to upload also sliders which You’ve provided but.. when I want to import it, I click on “Import slider” and nothing happened. It’s the same situation when I click on every option while creating a new slider. It’s very strange and I’ve never had such problems with themes and in every was revolution slider inside. Could You look at it? I can give You pass to site but here it’s a little bit unsafe. I’ve got of course WP, theme and all plugins up to date and tried on different browsers as well as operation systems.

Thanks for any help
Mateusz