thanks a lot!
So far it worked. No need for sudo to run manjaro-chroot.
Now I’m trying to follow [HowTo] Recovering from an interrupted update/upgrade and I launched the command
[ -f /var/lib/pacman/db.lck ] && rm -f /var/lib/pacman/db.lck
pacman-mirrors -f && pacman -Syyu
update-grub
exit