Hello again!
Thank you for sending the new log. Checking it with my peers, this new entry shows a very specific crash type, related to part of the mesh merge process between MetaHuman:
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address
FDynamicMesh3::AddTriangleEdge()
FDynamicMesh3::AppendTriangle()
FMeshDescriptionToDynamicMesh::Convert()
CopyMeshFromSkeletalMesh()
MergeHeadAndBody()
This means that the engine is crashing during the MetaHuman mesh merging process, in particular when it combines head and body meshes. The crash occurs when adding triangle data, pointing to either broken geometry, invalid mesh data, or corruption in one of the MetaHuman parts.
So, in order to solve the problem, try reimporting a clean MetaHuman, and test if without any modifications. This will tell us if the problem is in your current asset setup, or between the engine itself.
Next, open the skeletal meshes and check the LODs for any corruption or missing sections. You can also remove all LODs temporarily for testing. Do the same for any custom geo in use (clothes, accesories, etc). I would also check all your meshes in Blender/Maya and look for any non-manifold geometry, or duplicated vertices.
Finally, as in our previous update, please clear the Derived Data Cache, by deleting the folder from your project directory. And implement the “Verify” option in your UE build from the Epic Launcher.