Impossible to open lightbox map

Hi all,

from a couple of days it’s impossible to open the lightbox map in a popup.
I haven’t done nothing particular, has just stopped working!
When I click on it, the browser try to open this link http://www.roadsfortwo.com/#gmw-dialog-googlemapswidget-5 and then it return on the homepage.

This is my site, http://www.roadsfortwo.com , thumbnail map is on the right bar.

Thanks!

https://wordpress.org/plugins/google-maps-widget/