The reason may occur:
1. The project is too large
2. The project is broken
3. The resources are broken
4. The number of fixed points of a single resource exceeds e.
Solution: Deleted some models. The reason is that the model is too large and the number of faces and vertices is too large.
View the number of vertices of the model in
Unity3d Expand the fbx model and click the mesh file inside to see the number of vertices. For example, the following: 1052 verts, 1471 tris, uv, skin.
