zfsbootmenu for Ubuntu

I like your script but when I tried to modify it for Ubuntu 24.04 Noble by changing the /etc/apt/sources.list here-enter scripts from debian to ubuntu and from bookworm to noble it ran to completion but failed to boot.  the messages were couldn't find kernel in zpool/ROOT/ubuntu and environmental file zfsbootmenu/bootenvs missing.  Can you help me modify the script to remove these errors?