Visual Composer

I have commissioned a company to build a WordPress website for us. The job should have lasted a couple of weeks but instead took several months. Regardless, I now have a technical issue but the response is inexistent. So I am trying to fix it myself.

Here’s the issue.

While editing I used to have the option to have two kind of editors. The webmaster installed the SAILENT visual composer plugin which allows two types of editing. CLASSIC MODE and PAGE BUILDER. The first one showed a frame full of items that could edit visually. The second it’s only codes (unfeasible since it’s not even HTML).

Issue is that for some reason I have messed something while editing and the CLASSIC MODE is now EMPTY. Totally Empty.

Any suggestion of what might have happened? Thanks.