I can't access site from frontend or backend!!

I am using a temporary site: https://2b4.31e.myftpupload.com/

Last time I used it, a few days ago, it was working fine. I haven’t changed the coding in the backend at all, only modified a theme, which I bought, through their frontend modification pages. Now I can’t find the site at all on any of the devices in my house. It doesn’t load up at all through the front or backend. I am very worried that something has gone terribly wrong to the site but am completely baffled as to what that could be. When I try to go the the site the computer keeps timing out but it is not a server issue, I have already checked with Godaddy who is hosting the site. Please help!!!