Building Win64 Shipping and get this error when launching: Missing Dependency, request for /Engine/EngineMeshes/Sphere.Sphere but it was still waiting for creation

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I have built Win64 Shipping and staged everything. When I run the exe, I get this error:

LowLevelFatalError [File:D:\phx_stream\Engine\Source\Runtime\CoreUObject\Private\Serialization\AsyncLoading.cpp] [Line: 3006]
Missing Dependency, request for /Engine/EngineMeshes/Sphere.Sphere but it was still waiting for creation.

Looking thru my staged directories, I find this:

D:\phx_stream\PhoenixGame\Saved\StagedBuilds\WindowsNoEditor\Engine\Content\EngineMeshes\Sphere.uasset

So it seems to exist. What could the problem be?

Steve