The same with new efi file, after choosing “Haiku” from grub menu I get “Select boot volume (Current: None)” in Haiku boot menu.
I get updated efi file from installed system folder “/system/data/platform_loaders/that_file_name.efi” and renamed it to “BOOTX64.EFI”, and puted in “/EFI/HAIKU/”
Entry in grub menu:
menuentry “Haiku” {
load_video
insmod part_msdos
insmod chain
search --fs-uuid --set=root 91B8-B57A
chainloader ($root)/EFI/HAIKU/BOOTX64.EFI
}