##HTTP Loopback Errors Antagonist ###https://www.antagonist.nl/ HTTP Loopback Connections are not enabled on this server or are not functioning properly. You may encounter stalled, significantly delayed backups, or other difficulties. See details in the box below. This may be caused by a conflicting plugin such as a caching plugin. Click for instructions on how to resolve this issue. Details:
Loopback test error: Operation timed out after 4000 milliseconds with 0 bytes received. URL: http://site.com/wp-admin/admin-ajax.php. If you need to contact your web host, tell them that when PHP tries to connect back to the site at the URL http://site.com/wp-admin/admin-ajax.php via curl (or other fallback connection method built into WordPress) that it gets the error Operation timed out after 4000 milliseconds with 0 bytes received. This means that WordPress' built-in simulated cron system cannot function properly, breaking some WordPress features & subsequently some plugins. There may be a problem with the server configuration (eg local DNS problems, mod_security, etc) preventing connections from working properly.