DLC pakfile doesn't work on ios system

I use DLC patch to released other pakfile. and when i put the *_p.pak in the Content/Paks folder on runtime,and restart game, the game will be crash on IOS system. why?
here is the folder tree

The Project_p.pak file is additions content.

it is Project_p.pak is wrong?


Have you work it out? I am also want to know how does pak patching file work on IOS system.