In this same module we have "Mwalimu Nyerere alijulikana sana." This is one clear indication that "Hawajulikani" should be accepted as an answer.
It just accepted my "hawajulikani," but indicated I had a typo: hawafahamiki. That's quite the typo.
My guess is that your answer is correct as well, though it may need an additional a, like hawajualikani