Thank you!
I logged in and checked, everything seems to be configured correctly.
I logged in via FTP as well to debug the code, and I found the issue. It seem like the WPBakery page builder shortcodes are not executing. This was a known issue on earlier known versions of that plugin, and was possible to resolve via adding the following custom code:
WPBMap::addAllMappedShortcodes();
However, this no longer works, and the post contents are simply returned empty. Please try updating page builder plugin to the latest version, to make sure this is not a known issue, that had been resolved before.
After that, try re-creating the index table, so the shortcodes are executed again.