Can't cast Confront the past
the new card in Strixhaven doesn't work.
["Confront the Past"]
Note that Tibalt doesn't count as a Planeswalker (only as Valki) in the graveyard, so if it is the only Planeswalker in the graveyard, and there are no Planeswalker in play, "Confront the Past" has no legal target so cannot be played.
bug is still in the game as of january 2022
Just happened to me