How can I input a UTextture2D into UPaperSprite

I load a image from disk to a UTextture2D,then I put this image to a UpaperSprite. But, I cant see anything in Editor.
like this

https://forums.unrealengine.com/filedata/fetch?filedataid=168281&type=thumb

the image loader program copy from A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums

this is my blueprint

https://forums.unrealengine.com/filedata/fetch?filedataid=168283&type=thumb

the function SetShipSpriteComponentByUs code is

https://forums.unrealengine.com/filedata/fetch?filedataid=168284&type=thumb

https://forums.unrealengine.com/filedata/fetch?filedataid=168282&type=thumb

I dont know how to fix this bug