EFI debian grubx64 : Access Denied


I’m trying with Packer to install a Debian VM with UEFI on Proxmox.
We have a working boot command :slight_smile:
debian.pkr.hcl.txt (2.3 KB)

preseed_debian_bookworm.cfg.txt (23.2 KB)

The installation of Debian is working fine and then at the reboot :

Do you please have an idea of what is wrong ?
Thank you.