EDIT: I’ve found a solution without disabling IO Store!
Unfortunately I’m not sure if it’s a solution to everyone else’s issues as well. I don’t know why, but this option inside of my Project Settings was set to “LZ4”. Changing it to “Oodle” fixed my packaging errors.
Good luck!
I’d like to mention that I’m also having this issue with a project that I’ve converted from UE5 EA to UE5 Preview 2! Additionally my project is a C++ Project.
I’ve tested it on an third person template C++ project made using Preview 2, and it builds fine so I’m guessing it has something to do with converting from UE5 EA to UE5 Preview.
As mentioned, turning off “Use IO Store” fixes it for me too. Outside of this though I’ve also tried deleting my non-essential Project files, and then regenerating my project files. Only thing that actually worked was turning off “Use IO Store”.