This is a recurring problem with Hungarian on Duolingo. In the same lesson, one out of every second sentence uses the present continuous, the other one rejects it, like here. I am now writing on a piece of paper exactly what is requested, even if it is wrong, otherwise one cannot proceed to the next lesson.

It is frustrating, isn't it. Another for the list of "Beta" fixes.

"From where does the airplane take off?" This is a better word order as it prevents ending the sentence with a preposition.