In the existing comments David B. noted that the opening paragraph of our lesson had a mistake: the word "revise" was used instead of "review." I don't see that he returned your request for more specifics to correct the mistake thus this communication.
Here is the opening statement to this lesson with the word that needs to be changed in all caps (take note of the last sentence):
"To express a negative feeling about something or doing something, e.g. it annoys you, it bores you, it saddens you... we often use verbs that work the same way as the verbs "gustar" and "encantar". To REVISE how gustar/encantar work see links at the end."
Truly not a big deal at all but since you asked for help in fixing the wording I thought I would send this message.
Let me also take just a moment to say how amazing these lessons are and that they are truly a gift! Rare, tiny mistakes in something of this magnitude should be expected. :)