I did some research. The skins in question was causing disconnects and game crashing, so the mythic store, as well as all the skins, have been temporarily disabled.
We are temporarily disabling all Mythic Skins as we investigate an issue discovered in today’s patch that is leading to crashes or disconnections from various matches when those skins are equipped. If you currently have any Mythic Skins equipped, you may find your heroes reverted to the default Overwatch 2 skin in your next game. You can still equip any Rare, Epic, or Legendary skin. We have also disabled the Mythic Shop until we can resolve this issue. You can still continue to collect Mythic P…