Site health me devuelve error critico

Hola, el site health de mi sitio me devuelve 2 errores criticos:

2 critical issues
The REST API encountered an error Performance

The REST API is one way WordPress, and other applications, communicate with the server. One example is the block editor screen, which relies on this to display, and save, your posts and pages.

The REST API request failed due to an error.
Error: cURL error 28: Operation timed out after 10000 milliseconds with 0 bytes received (http_request_failed)
Your site could not complete a loopback request Performance

Loopback requests are used to run scheduled events, and are also used by the built-in editors for themes and plugins to verify code stability.

The loopback request to your site failed, this means features relying on them are not currently working as expected.
Error: cURL error 28: Operation timed out after 10000 milliseconds with 0 bytes received (http_request_failed)

he seguido los pasos de este articulo para solucionar el error:

He contactado a mi hosting y no se resuelve

He desactivado plugin por plugin y el error continua…

ya me han dicho que no es error del tema.

Quien puede ayudarme? gracias