Hi,
I've seen the same issue and I believe it may be one of two things. First is that, it looks like the brwoser may treat what Alfresco is doing as an attempt to create a pop up, so you'll need to allow popups to get it to do anything at all (I'm using Chrome, don't have access to Safari).
The second issue seems to be intermittent, and I'm testing this on a local dev box which is not ideal here, but it seems that when making a request to export the model, it may receive multuiple responses (e.g. in progresss, in progress, done!) but there seems to be an issue with the scope of "this" in the client side Javscript when it goes back through the retry loop after recieving an intermdiate (not done yet) response. This causes a javascript error to show up in the browser console and stops it doing what it's supposed to, as per attached screenshot. I'd recommend raising a Jira if what you're seeing matches this
I've tried clicking the export action multiple times - sometimes it works and sometimes it doesn't
Regards
Steven
