1> Click to select "Autofill from URL" from the Cite Tools menu option.
2> Enter URL like "http://www.yahoo.com" or DOI like"10.1000/182".
3> Click to Insert.Note the dialog stays open and you see the notification saying "Status:error Error".
Also, XMLHttpRequest cannot load http://citoid.wmflabs.org/api?search=http%3A%2F%2Fwww.yahoo.com&format=mediawiki. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://en.wikipedia.beta.wmflabs.org' is therefore not allowed access. The response had HTTP status code 502 appears in the console.
See screenshots.