Diagnostics
When a connection misbehaves, the question is always the same: is it the plugin, the host, or Divi? Diagnostics answers it before you spend an afternoon guessing.
The self-test
A 1,805 check run against your exact install — the PHP floor, the WordPress and Divi versions, Divi itself, the connector and every tool group. From wp-admin it reports 1,623: five groups — accessibility, Theme Builder, Divi Library, content coverage and WooCommerce — need Divi’s builder framework, which that screen does not load, so they are skipped there and Diagnostics names them on screen. It reports named failures rather than a green tick, so a problem tells you which contract broke instead of that something, somewhere, is wrong.
Preflight
The things that break a connection, checked before you hit them: REST availability, SSL, and whether the Divi 5 builder is actually enabled.
Host problems, in English
The misconfigurations hosts actually cause, named with the fix rather than a stack trace — so you can send your host a sentence they can act on instead of a screenshot of an error.