Copy of the error :
Uncaught DOMException: Failed to read the 'contentDocument' property from 'HTMLIFrameElement': Blocked a frame with origin "[login to view URL]" from accessing a cross-origin frame.
Looking for someone that can fix it
if you find someone, he'll see the issue in the console of the site, and the error happens line 70 of application/views/widget/[login to view URL]
And this is the most known answer about this subject [login to view URL]