Hi, friend of mine have trouble register new account. He fill the sign up form, receive email with code, redirect to the page to confirm with code key, username and password. But the page show error: the username is not valid, the key is wrong or expired. But it is actually not expired because he received email immediately.
He tried password reset, but do not receive email. He tried to cancel the registration but blank page is showing.
Could someone explain what to follow to register new account?  
Thank you!