Thanks for flagging this. I’m seeing the issue you’re reporting in the latest version of the engine as well. From what I can tell, there were some changes to related assets (like the demo station mesh in the scene and some Niagara-adjacent items as well). I don’t have a quick answer for this, but I wanted to get back to you sooner rather than later. I’ve created a ticket for digging into this issue in the Content Example project, and I’ve marked the ticket as public (so if approved, you’ll be able to see its status): https://issues.unrealengine.com/issue/UE-295459.