Hello.I'm having problems packing unreal engine props.

An exclamation mark appears at the beginning of the options other than windows to package the walkthrough scene that I created in the unreal engine from my Windows computer, and I can’t package them, is there a solution to this? Thank you for helping me.
(upload://kIZrzPRyOyNuQGjjJuUSQm30dAL.jpeg)

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For what platform are you trying to build?