Mistake in puzzle

lichess.org/training/14488 there is mistake in puzzle 14488,
because there is mate in 2: Qe2 Qe1, but lichess wants me to mate in 5

You are right! This issue was already reported in another tread, some months ago but, by the looks of it, the solution hasn't been updated yet.

Solutions don't get updated. The puzzle has been disabled already, hence why you can't vote on it. But it's still accessible if you want to see it.