Visual Composer not working

Hi,

I just bought your theme and I’m now trying to set up the first page. Unfortunately the visual composer is not working at all. I add an element, try to save it, but absolutely nothing happens.

Furthermore, when I add a row (that seems to work first) I can’t delete it afterwards. I click on the Icon with the trash can on the top right and nothing happens. And I can’t fill a row with any other element, nothing seems to be saved. When I save the whole page, everything is gone and the page is empty again.

Yes, Javascript is activated and yes, I just installed all required plugins.

I would really appreciate your help.

Thanks in advance,
nina