I’ve added this line to my wp-config.php file: define('ALTERNATE_WP_CRON', true);
I’ve also added my wp site’s hostname to the hosts file on the server.
Now I’m getting a different error, which hopefully means I’m making some progress:
The loopback request to your site failed, this may prevent WP_Cron from working, along with theme and plugin editors.
Error encountered: (0) cURL error 60: Peer's Certificate issuer is not recognized.