Rest Api

Hello!
I just upgraded to version 6.4 and my site health showed this:

As a result, I am running it a version before… I see that there are many problems based on user posts on the forum… Can you help?

“The REST API is a way that WordPress, and other applications, communicate with the server. An example is the block editor screen, which relies on it to display, and store, articles and pages.

While testing the REST API, an error occurred:

REST API endpoint: https://metalstories.gr/wp-json/wp/v2/types/post?context=edit
REST API response: (http_request_failed) cURL error 28: Operation timed out after 10005 milliseconds with 450 out of 1301 bytes received”

Foto: https://ibb.co/s6dGQQY

The page I need help with: [log in to see the link]