In the new update 1.8, the Pen and Paper Minigame no longer works. I believe that the special effects load for the player's class choice but other than that, its all black. you don't get to pick anything like class or who joins you. so now there is no way to get Tasha's tokens, locking you out of the park restroom key options. 

Strange, I didn't seem to have this issue

It's working beautifully for me, although there's been some tweaks to a few of the abilities (and the MC's Druid class still has wildly inaccurate ability tooltips on the character selection screen).

Make sure to be on 1.8A version and set the resolution to 1080p if still experiencing the issue.
PS: the give up button currently doesn't work but it's getting fixed for B version, which is coming soon, no date.