I'm making a top-down 3d game with a simple NavMesh. The game runs correctly within the editor but not after building to an executable. I get the following error for each of my agents: "Failed to create agent because there is no valid NavMesh (Filename: C:\buildslave\unity\build\Modules/AI/Components/NavMeshAgent.cpp Line: 634)" Interestingly though, the agents still move correctly. Here's a picture of the components for each of the agents: Here's a picture of the NavMesh Surface component I'm using. Note: I'm using this in conjunction with ML-Agents.