Hi Tina, I notice when clicking on the page fancybox is called and the darkened screen is the fancybox overlay. This is normal behavior if you have a popup using fancybox, only nothing is poping up and therefor you cannot close fancybox and are stuck on the fancybox lock screen.
I suggest you look at the settings to see what is calling fancybox.
Let me know what you find.
Regards
Ernest Close