I can't start ubuntu of my own self-made ISO image.

[yamad-linuxer]

Hello.
I am trying to create a new distribution of Ubuntu derivatives.
I installed Xfce, LightDM, etc. based on a minimal ISO image, and created an ISO image with BodhiBuilder.
The ISO only booted on UEFI, not the BIOS.
I want to be able to boot with BIOS but I do not know how.
The error "Failed to load ldlinux.c32" occurs immediately after booting the ISO image
Could you please tell me how to do it?
As far as I checked it myself, there could have been file system problems, etc., but the virtual machine from which BodhiBuilder was created has started successfully.
The Ubuntu version is 18.04. 1 LTS.
Thank you in advance.


Postscript
I am Japanese and I use Google Translate because I am not good at English.
And, I posted a discussion for the first time.
There may be strange English. I'm sorry.

[wildmanne39]

Thread moved to Development CD/DVD Image Testing a more appropriate sub-forum.