I suggested the game to my friend and she went to register however, after she typed her sign up details and proceeded to try and register, it got stuck on the loading screen and even after about half an hour it had still not registered her.
She has tried using her mobile, Google Chrome and Firefox and it's done the same thing every time. I also tried to help her out by registering her account using my computer in case it was her internet but it did the same thing for me.
All of the data she entered (Username, E-mail and password) had ticks next to them so they were all valid.