WP Bakery (Visual Composer)

I use WPBakery page builder, via Visual Composer, for my page creation and for a few days, when I want to change a photo it turns in a vacuum. I have the impression that WPBakery can not find the way to the library …
I bought on Envato theme “ottavio” theme, I saw that it is no longer updated since April 2016, is this the reason? if so, how to solve the problem because I see that the theme is still on sale on the Envato?
Sorry for my english, I’m french and I don’t speak very well.