-I am still receiving the "Image 'scenes/Scene5G_FinalEmbrace_3b' not found." error message on my Steam version of the game for the large breast version of the breast adventures mode of the Paris route for Grace.
-I also think the game doesn't even try to to call the large breast version of the image of Grace's Departure in the scene soon after where she swim alongside Malcolm, but it might be intentional that there is no alternate pic to begin with. Not sure.
(Still using the steam version of the game since the beginning, but on steam, I have a SFW handle, while on itch.io, I use my NSFW one, so I am communicating about the game here, I hope this isn't a problem)
(also, for some reasons, the discord link you give in the OP lead to nothing).