We are aware of an issue on version 1.21.12 where a black screen appears in the speakeasy area after attempting to complete the Chapter 30 task, "Enter the Final Number". A fix will be available in the next update, version 1.21.20, which will be released soon. As a workaround for this issue, we recommend waiting about 20 seconds for the animation to finish and the quest dialogue to appear. After completing all the quest dialogue and the subsequent "Flip the Switch" task, the speakeasy area should reload normally. We apologize for the incovenience as we work to fully resolve this issue. 
_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-
Vineyard Valley Game GUIDE