Baked Failed uv projection failed
https://lv-cf.shapespark.com/210629_exterior
The error you get means that the scene cannot fit in the number of lightmaps given by the Max lightmap setting in the Bake tab. Increasing the Max lightmap will help. Plus, you can decrease the Lightmap resolution, because the default 75 is suited for interiors, and 5 should be enough for such a large exterior model.