I’ve encountered a bug where I’ve finished The Ark Society - Isle of Sgail on Master difficulty, Silent Assassin Suit Only, which unlocked all the corresponding classic challenges except 3 challenges, “The Classics” on Professional and Casual, despite having unlocked all of the SA, SASO, Sniper A., SO and No evidence single challenges for all difficulties, so the 3rd unlocked challenge is “The Classics 2” which won’t unlock because of the two “The Classics” that aren’t unlocked.
This in turn blocks all my destinations at 99% which is very frustrating. And no amount of replay either in master, professional or casual will solve it.
The same problem was encountered with this person apparently : https://www.reddit.com/r/HiTMAN/comments/hks11h/the_classics_2_bug/