Both PC and ipad 2 version sutck on loading

So today, i used a public computer and logged out as usually. However, when I came home, I couldn't get in as the version is stuck on loading, before I had chose yo use Google, Facebook or email to log in. When I used my computer, I said that it was an DNS problem and the server could not be found. It is something about the sts servers? Thankyou.

I had this problem aswell What my solution was formating my phone. i usually say to erase caches but that didnt work so i had to format my phone. It worked after that.