No boot device found on new install

For some reasons I decided to do a new install at first I ran into grub was getting an other drive like this thread mdadm: no arrays found in config file or automatically I fixed it by following couch_potatozes advice

I was making sure I did update grub,

booted several time no problem, but now out of nowhere getting "no boot device found" so how can I fix it since I do not get the grub blue screen anymore ?

root@OMV-Dell:~# update-grub
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.19.0-5-amd64
Found initrd image: /boot/initrd.img-4.19.0-5-amd64
done
root@OMV-Dell:~#

Fixed

I just unplug an extra USB drive!

look at the link I posted mdadm: no arrays found in config file or automatically

and make sure to disconnect any USB drive.