"It has no value."
Translation:Ça n'a pas de valeur.
C'est = it is/that is
It has no value = Ça/Il/Elle n'a pas de valeur.
Je suis d'accord avec CommeuneTexane. You have conjugated both être and avoir, so created the sentence "It is has no value" which makes no sense.
I could have understood if you tried to say "It is worthless", but that would be C'est sans valeur.
However, I think Il / elle n'a aucune valeur would also be a valid answer to this exercise.