WinPE x64 UEFI boot error 0x7f048283

[NiKiZe]

your winpe.efi returns and won't boot. (remember in efi mode only efi binaries can run, not legacy NBP files, so you need special handling of ${platform} or similar to detect and handle which file to download and run)

The recommended way to boot winpe from ipxe is using wimboot which is a NBP and efi combo file so very little, if any, special handling is needed.

also you might want to test a original build from http://boot.ipxe.org/ipxe.efi just in case rom-o-matic is the cause.