How to restore the ability to edit in the visual part of 1s-Bitrix?

Question

1C-Bitrix

After contacting 1s-Bitrix, the support service solved the problems that appeared after the update, but the ability to edit elements in the visual part of the site disappeared, after which I turned to them with this question, to which I received an answer that contact the site developer ... somehow everything sadly )). The question is how to diagnose what could be the problem and where to dig, who can come across? Now you can edit the first two elements at the top of the site.