Visual Composer doesn't work properly

After updating the theme newspaper to the last version, 4.6.3, and the plugins too, visual composer doesn’t work properly. When I see the tutorial, it shows that if you go to Grid elements and click on add new, you should see a “Preview” button at the top right corner of the grid element builder which I cannot see, so I cannot preview de grid before publishing it.

Moreover, when editing or creating a page, the tutorial shows that a button called “Frontend” should be placed at the top right corner of the Visual Composer, but I cannot see that button. So, when I try to add new elements, some of them are not available, for example post grid, media grid, and more…

These problems were supposed to be fixed with the theme update, but they aren’t.

I am also with this problem. I have more options to include the Grid Elements modules. I opened a call with the author of the plugin and he wrote:

The issue is because there is an inbuilt version of Visual Composer (or the related code) present in your theme which is overriding the standalone plugin version and hence causing the issue. You will have to get rid of it. I would advise you to do so with the help of theme author, otherwise you might loose the extra elements added by him. Once this is done, you can install the standalone plugin and it will work fine. Kindly check.

Thank you,