Error in CM BYT045

In the Chess Mentor Lesson "Ruy Lopez Chigorin Variation: Transition from Opening to Middlegame," there is an error in one of the incorrect move explanations for White's fifth move. If White plays the gambit continuation Nf1, CM gives an explanation of best play from the position in which it provides the line

"16...Qc5 17.Bh4 Be6 18.Rc1 Qb7 19.b3 Rac8 20.Ng3 d5!"

...which is erroneous because the black queen cannot move from c5 to b7.

I don't know if this is the right place for this correction; if not, please tell me where I should put it.

Also, can anyone please explain the correct line? Thank you.

Thank you for pointing this out. The error has now been corrected.