Site Set Up Wont Load In

[MoritzParker]

Hello, so i recently have been trying to edit my site and change the entire look of it, but for some reason, when i got to hit preview site, the mobile phone that normally shows the iphone version of my site shows nothing, aswell as when i go and hit edit site, it sends me over to another tab and just doesn't load it any page for hours. Its just a google chrome or fox grey page that shows nothing can be loaded in. Would love some assitance on this