Trying to make a snapchat but always have a connection error?

So I'm trying to sign up for SnapChat on my iPhone but i'm running into technical issues I can't seem to find any documentation of online. I'm at the screen where I choose my username but everytime I type the username I want and hit continue it says "Could Not Connect. Please check your connection and try again." This doesn't make sense since I'm connected to wi-fi and my 3G network, and my internet browser on my phone works fine. Does anyone have any advice?

I've been having the same exact problem since I first tried to make an account yesterday, it must be a bug.