Offsite page unexpected issue

I’ve an offsite page its called “AREA RISERVATA” that worked fine but now… it doesn’t work anymore why?
I have not edit anything into my project so… why when you try to click it it seems to have no link to external page?
Any suggests please.
Thank you so much
Here the URL : http://www.mobila.it/
and this is the offsite link: http://sms.idigitalcompany.it/userPreferences.php?f=setupUser