Dark ripped edges/corners after Lightmass computing

[Abou]

@anonymous_user_f26c856c1

Do you have portals in your openings (window, door)?
And just to make it clear: does your wall have thickness?

Yes the walls got thickness.
Yes Portals on every light entrance like windows.

https://thumb.ibb.co/mHrDqx/Highres_Screenshot00002.png