AJAX HTTP error messages
You may occasionally receive an “AJAX HTTP” error message when working on your site. It most frequently occurs when running roundtrip batch imports as a Drupal Administrator, but can occur other times as well.
This message is almost always erroneous, and can be safely ignored.
Above the error message there is a link that reads “Please continue to the error page.” Following this link will redirect you to the actual success and error messages page. We suggest always clicking through to see the actual messages.