Thanks for reporting the problem!
Unfortunaetly, I cannot reproduce it. I started a game with Page, and I could access and change the autoplay for Treasure Hunter from the pile, the card in hand and the card in play. Make sure to klick on the circles (radio buttons), not the text.
Also, for some reason, I could not load your game. Was it a 1-player game? The "Add bot" button does not appear, but when I click "Ready", it says that players are missing. Strange.