3D tile and map does not load after packaging

I have loaded 3D tiles (for terrain) and TMS (raster overlay) from my own local server. it works very nice in Unreal engine “editor mode”. but after packaging it does not show any thing. (even I can see my.exe file send a request to server -for tiles and texture - and server responds http 200, but nothing showed up)
should I change or set any settings?

It’s hard to say. Perhaps the time of day is wrong, so it’s dark? Or the starting location of the player is not what you expect? Screenshots might help. Does the Cesium for Unreal Samples project work for you when packaged?

I packaged it on another PC, and works fine, could not realize the reason!