Help, UE5.3 "Grid Body" thumbnail does not display and turns black

Development Rendering
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When I finished using Nanite, all the mesh thumbnails turned black and couldn’t be viewed at all. Help

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:confounded: :confounded: :confounded: :confounded: :confounded: :confounded: :sob: :sob: :sob:

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Help me, I can’t breathe anymore :confounded:

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help me :sob: