This bug appears in kingdoms expansion. Could be modding a cause to this ? I Haven't edited any original file or folder so idk why this happening.
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This is in Brittania but it occurs in all the other expansions where the settlement is not the same as the one in vanilla. The buildings are not only black, but i can't move units in certain ares so this is affecting the gameplay even more.
I was told by Gigantus to ask here about this.