In my current WordPress project I get the following error message when I view my cronjobs:

There was a problem spawning a call to the WP-Cron system on your site. This means WP-Cron events on your site may not work. The problem was: Unexpected HTTP response code: 503

It causes several of my plugins to not work correctly, because the cronjobs don't trigger. How can I fix this? What do I have to do to the server configuration for this to work? Why does this error occur anyway? I don't quite understand it.

When I set up the same system locally with XAMPP, everything works fine, so it has to do something with the server.

I know there is a workaround in setting up a real cronjob on the server, but that is not an option.

  • What triggers that 503 response? (enable debug and debug log, check the debug log) – kero Dec 13 '17 at 11:49
  • 1
    Some hosts don’t allow websites to access themselves, which wp cron does. Contact your host. – Jacob Peattie Dec 13 '17 at 11:56

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