Splitscreen causes a crash when a 3D widget is added to the level

If there is a 3D widget in the level when a player is added via split screen, the editor will crash.

1. Open attached project
2. Click play
3. Notice the Editor crashes

"Session Disconnected" UEFN

UMG RichText not appear image when packaged

Why does the REMOVE method of map container remove elements have memory leaks?

How does TextureRenderTarget2D get TArray<uint8> type data?

What is the cause of the packaging error falling back to 'GameUserSettings' in ue5?

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Do I need to call Destory method to remove components from Actor when Destory method to remove Actor?

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In UE5.4, custom variables in the level blueprint cannot be set to default values, and the eyedropper tool is also unavailable, whereas in UE4.27, these features work normally.