"Ik heb geen profiel op deze website."
Translation:I have no profile on this website.
You have to ask the ones that made this translation on DuoLingo. If it is a correct translation, they will add it to the possible translations.
I am a Dutch native speaker, so I could be wrong. But it seems to me that "profile" / "user profile" or "account" / "user account" are interchangeable in this sentence.
The only difference between account and profile I could think of is: account = just the username + password, profile = all the user information (data)
I have found some information about the subject on this website: http://ell.stackexchange.com/questions/17161/what-is-the-difference-between-account-and-profile