Thanks to your bug report I think I have a fix for this rolled out now! I did a review of all calls to XMLHttpRequest in the project (they are all in components/session.js) and there was one place ...

I've been debugging this a bit. It appears the problem is that when the XHR gets abort ()ed, it sets the properties.client to null. Then receiveResponse tries to use the client, but it doesn't exist.

What is AJAX (Asynchronous JavaScript and XML)? AJAX (Asynchronous JavaScript and XML) is a technique aimed at creating better and faster interactive web apps by combining several programming tools, ...