Problem with lightmass, black spot and shadows not showing

-I just started using lightmass and am having a bit of trouble, first there are black spots in nearly all meshes, i tried increasing the lightmap resolution, but the spot don’t disappear, any advice on now to solve it, the uv’s are fine, i made auto uv lightmap as-well to see how it looks by giving it a separate uv set, it did get better but there were still spots on it, any advice on how to solve it.

-Secondly, when my directional light is in stationary, and after i have baked my lights there are no shadows showing from the meshes like it does on movable i tried rotating, changing lightmass settings multiple times, but there are no shadows at all, just very soft ones, how can i solve this problem, any particular setting do i need for lightmass, or do i need to increase the lightmass resolution, any advice is appreciated thanks.