User invitation

Dear Tallyfox support,   I invited a user to our FIFA Connect Collaboration Portal. He send me the following request:   I click the, but i can not see "register". System asked me «e-mail» and «password» for «log in», but there is no bullet «register»   User email is: Сиромолот Ð’. Ю.   Can you please help me?   Kind regards, Hannes