Error that I get in the site health I think after the update to WordPress 5.3

[juliojulian]

There is an error that I get in the site health I think after the update to WordPress 5.3.

The REST API request failed due to an error. Error: [] cURL error 28: Operation timed out after 10001 milliseconds with 0 bytes received

When I change the theme, the error disappears, so I thought to report in this place.
Sorry if my deduction was not that exact and that was not the case.

[b-t-k]

Me as well. Something is causing my server hiccups so I went looking and came across this issue. I also get a loopback error that is directly related to activating Fruitful. Not sure if thats whats causing my server resource issues but I thought I would chime in.

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: Operation timed out after 10000 milliseconds with 0 bytes received (http_request_failed)