WPBakery and WP 5.3 problem

I have updated WP to version 5.3. The blocks saved in WPBakery mostly work, but there is a problem with the Gutenberg editor – regardless of whether I use predefined elements or create new ones, they are not displayed at all. Also when I try to edit a saved item, Gutenberg displays an empty editor.

All plugins are up to date. The last update of the theme was October 8, which is before I bought it.