When they reached, by flying, Gothis hut at the top of the highest peak in Berk, they found that Gothi was standing outside waiting for them.

You came here about the curse and to ask if I know if it can be reversed, And if so, how? "Yeah." I'm sorry to say but, it cannot be reversed unless the one who cast the spell is either defeated by the one who is cursed or lifts the curse willingly. "Thank you Gothi. I really appreciate this." They then left headed toward the cove.