ghostbsd cannot dual boot with ubuntu

[VMC]

I've tried every possible combination of grub menu commands:

menuentry "GhostBSD Loader" { insmod part_gpt
insmod chain
set root='(hd3,gpt1)'
chainloader /EFI/ghostbsd/BOOTX64-GHOSTBSD.EFI
}
That is the one everyone list when trying to dual boot with ubuntu.
It doesn't work. Grub output is:

error: image has invalid negative size

Tried other menu commands as I stated. Will not boot.
ghostbsd will boot using it own boot manager, but cannot get it to dusl-boot.

Has anyone dual booted ubuntu and ghostbsd?

This link shows same error I got:
https://forums.freebsd.org/threads/grub-error-image-has-invalid-negative-size.70974/