I have the same issue but I think we are all wrong: it’s not black!!!
It’s not lit, I can see all the emitting materials.
If i change any material on my game plugging the albedo in the emission the texture and objects become visible.
The luck wants that I have an emitting neon and a fake light clearly visible since the beginning, the material is extremely simple (only a standard material with a white 1,1,1 plugged in the emission slot, I’m in the first steps).
If I’d not have that I’d thought it’s something broken, but luckily I’ve always been sure that it works (I can move around and everything work fine, except textures that are pitch black)
Please, can everyone try this? I think it could help us to find out the reason, if I’m rights (and in my case none of the above fixed, it’s two days that I try and I’m going crazy).