NavMeshSurface, cannot bake at runtime?

RuntimeNavMeshBuilder: Source mesh Map_10x10 does not allow read access. This will work in playmode in the editor but not in player
UnityEngine.AI.NavMeshSurface:BuildNavMesh()

Code (CSharp):

1. GameObject cb = Instantiate(Resources.Load(GetResourcesPath(mapLayout.ChessBoardName)), Vector3.zero, transform.rotation) as GameObject;
2.         NavMeshSurface nm = cb.GetComponent<NavMeshSurface>();      
3.         nm.BuildNavMesh();

 

Solved.

https://forum.unity.com/threads/run...xxxxxxxxxx-does-not-allow-read-access.512563/