The screen going black when you goto the castle with Raphael should be permission to run the video... Set the Larian launcher to ran as admin is the work around for this but Gog players need to do it after each patch comes out
Well, at my first run through patch 8 this was not a problem with the Raphael video, though it was with other videos.
Still, tried running the game with admin rights, but the same error occured.
Thanks anyway for trying to help. (and yes, I'm on Steam, not GOG)
Workaround with friend did also not work.
So at the moment the testing for BG3 is over until the problem has been fixed.
