Help debugging windows-to-linux build

Hi, all. I’m new to Unreal 5, just getting to the delivery stage of my first small project. I’m on a windows machine and trying to package from windows to linux. I’m able to build without errors, but the game is not running in Linux (Virtual box Ubuntu, 64bit). The windows build is working fine. Here’s part of the log from the Linux VM I think is relevant:

Windows 10, Unreal Engine 5.0.3

The linux package is also a .sh file, which I am running via the terminal (sh – is that normal?

Any ideas?