Blackfyre Theme Health Issues

I’m encountering, and have been for quite some time, two errors. These keep showing in the site health section. If I change to another theme the errors go away. I’ve gone through and disabled plugins one by one and there was no change. It’s only when I change to another theme that these go away.

A PHP session was created by a session_start() function call. This interferes with REST API and loopback requests. The session should be closed by session_write_close() before making any HTTP requests.

and

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)