The REST API encountered an error

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

When testing the REST API, an error was encountered:

REST API Endpoint: https://mywebsiteurl/wp-json/wp/v2/types/post?context=edit
REST API Response: (http_request_failed) cURL error 28: Connection timed out after 10002 milliseconds

Your site could not complete a loopback request

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: Connection timed out after 10002 milliseconds (http_request_failed)

I am getting this error on my site health section. I disabled all plugins and activated default theme and checked back the issue is still there please help to resolve it.