@Phantomlover1717 It wasn't said anywhere that it will work without the illuminated wall. In the past all hot tubs required the illuminated wall, even if the event didn't have the illuminated wall as a prize (like the current event). Luckily the players have an option of getting an Illuminated wall though the Surprising choice if they want those additional party actions.
Just hosted the party, and the illuminated wall is still required. So if it is indeed a bug, it is not fixed yet.