Xing changed how their share feature works and the button does not work anymore. When asked about it, their support sent this reply:
Die Funktionsweise dieses Buttons ist nicht mehr dieselbe wie früher. Dies liegt daran, dass wir uns von einem sozialen Netzwerk in Richtung Jobboard entwickelt haben. Hier können Sie den Button neu konfigurieren, ob dies sinnvoll ist wage ich zu bezweifeln: https://dev.xing.com/plugins/share_button/new
paraphrased: The button now works in a different way as they have moved from being a social network towards being a job board.
Xing changed how their share feature works and the button does not work anymore. When asked about it, their support sent this reply:
paraphrased: The button now works in a different way as they have moved from being a social network towards being a job board.