Experienceproject.com keeps giving me a 403 FORBIDDEN error on every one of my devices, how, why?

I have two laptops and a iPhone. I try to access this site through all of them and they call give me a 403 forbidden error message and I can't get to the site. I don't understand why and I don't understand why I can't access it through any of my devices but it does work on my friends computer and the library. Could it be the shared internet connection, IP address or what?

Walmart connection