Slug edit button has stopped working

Hi there,

Suddenly, the slug edit button has stopped working. I press it and the form field doesn’t appear, how it did many times before. I noticed, that when I hit the button, address in the browser address bar change, adding “#post_name” at the end, but that is all what happens. http://monosnap.com/image/IRvLVdz7gdS5S2i3e7fliykh7QlcCW.

The url is http://wolkflow.com/.

I have X-Theme 3.0.1.

Thanks