https://bugs.winehq.org/show_bug.cgi?id=26898
--- Comment #17 from Someone scrimekiler@yahoo.fr --- (In reply to roger from comment #15)
"Screenshots are saved in dds format. When saving game, I get the following in console fixme:d3d_surface:surface_convert_format Cannot find a conversion function from format WINED3DFMT_B8G8R8A8_UNORM to WINED3DFMT_DXT1. Saved screenshot is completely black."
If this is really the issue don't expect this to be fixed anytime soon. For legal reasons they cant add the support in wine.
The preview of saved games are black instead of showing the ingame preview, that's the problem