No boot witch Grub2 for almalinux, redhat

Packer
1

Hi all,
I have some trouble to boot kernel with grub2. Message : “loading vmlinuz failed : no such file …”
my config :

   "boot_command": [

“ inst.text inst.ks=http://{{ .HTTPIP }}:{{ .HTTPPort }}/{{ user config_file}}”
],