I used Ventoy recently to install my new desktop and if I remember correctly, if your uefi/bios is set to boot in uefi mode and you set your usb boot device to use uefi mode Ventoy will boot the iso in uefi mode when you select normal mode from the menu. Because when not using Ventoy and you boot from a bootable usb flash drive you will have to select if you want to boot from the usb flash drive in uefi mode or not.i have booted in UEFI from Ventoy and trying to install the debian. I have even format my disk with gnome disk manager. Still got this error. Does this mean i have to boot in ventoy in normal mode and then install the debian? thats how i did last time