I'm also having the issue where after the nun scene the whole screen goes black, but I think I might've figured out why it happens. Every person who has had the bug has been on an old laptop, so it might be an issue with graphics drivers OR with the integrated graphics of the laptop. unfortonately im not smart enough to figure out to fix those problems but i think thats why the bug is happening! hopefully someone else can see this and fix this bug for themself lolz