Error : "xmlrpc connection failed".
With Jobaffinity's Wordpress integration, when you publish or unpublish an Job in the tool, it sends an XMLRPC request to create a ticket in Wordpress or delete it.
This action publishes or unpublishes the advert on the website. But at the time of unpublishing, if the site cannot be reached, you get the message :

Check that the website can be reached, that there have been no configuration changes and that no plugins are blocking XMLRPC requests in Wordpress.