I just resigned game #90213701 because Lord Rattington apparently died. On turn 26 it played a Plaza as its first card. The log reported that it got its +1 card and +2 actions, and then it sat there indefinitely and did nothing, apparently stuck on the optional discard a treasure for +1 coffers step.
I tried refreshing the browser window; that didn't help. I also tried using Undo to go back to my next turn and re-purchase my last card, but that didn't help either. Not sure what's wrong.
Thanks for the report. This looks like a relatively rare problem when the bot has played Plaza, has no more Actions in hand but Villagers.