Visual composer issues

Hi skywarrior team,

I have installed blackfyre theme but when I try to use Visual Composer I have some issues.

On Chrome : no block works, when trying to edit, the popup open and load screen appear/desapear and nothing happen after that.

On firefox, It works better but I still don’t see anything inside the visual composer popup when editing «text block settings» or «column settings»

Elements Working on firefox : «matches blok settings» or «clans bloks settings» or «news block settings», everything a «Tt» icon works in fact.

My wordpress is the last version and I have no plugin installed.

Waiting for your reply asap.