Nav Mesh Needs to be Rebuilt: How do I fix this error?

[JakeEyes912]

My group has been struggling to fix this. We were working in UE 5.6.1, and whenever we built the project, it would break. We’ve tried importing new nav meshes, changing geometry settings, and reconstructing the project itself.

Has anyone experienced something like this and has anyone been able to fix it?

[3dRaven]

A possible solution?

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After a long session of work (5 hours), I finally found the problem. In Unreal Engine templates, the level usually comes with partition enabled by default, so I guess the level gets an ID. This seems to be important for NavMesh, because when you create a new empty level it just has a default ID, and for some reason NavMesh can’t be built. Once I enabled World Partition for the level, my NavMesh finally worked! Hopefully, this will help people in the future. For world partition please watch youtu…