Virtualization is not enabled? Install.ps1 helps you enable it if not enabled. After rebooting, rerun Install.ps1 to install WSA. If it's still not working, you have to enable virtualization in BIOS.
If this workaround does not work, your PC is not supported for WSA. If you previously have a MagiskOnWSA installation, it will automatically uninstall the previous one while preserving all user data ...