cURL error 7 port 443: Connection refused (http_request_failed)

Hello, I’ve been dealing with the cURL 7 error for about 1 week and although I tried all the solutions I found on the internet, it didn’t solve my problem, how can I solve this error?

The REST API is a way for WordPress and other applications to communicate with the server. An example of this is the block editor screen, which relies on it to view and save your posts and pages.

While testing the REST API, a problem arose:

REST API u? noktas?: https://www.alanyasmile.com/index.php/wp-json/wp/v2/types/post?context=edit
REST API Yan?t?: (http_request_failed) cURL error 7: Failed to connect to www.alanyasmile.com port 443: Connection refused

Loopback requests are used to run scheduled events and are used by internal editors in themes and plugins for code consistency.

A loopback request to your site has failed, meaning that features that depend on these requests to work may not work as expected.
Error: cURL error 7: Failed to connect to www.alanyasmile.com port 443: Connection refused (http_request_failed)

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