Hi, I was boot repairing after a manjaro install on dual boot with windows. This time the live Usb with Boot Repair could not solve the problem. I tells me to do the following command:
sudo chroot "mnt/boot-sav/sdd2" pacman -R grub*-common shim-signed
When i execute it it gives the following error:
error: target not found: grub*-common
error: target not found: shim-signed
This is the pastebin from the Boot Repair report.
In a single command? 
It asks for an account log in.
The way i see it, chroot doesn’t see grub*-common shim-signed as arguments for pacman, but rather other commands to execute.
Enclosing the whole pacman command in quotes might do the trick:
sudo chroot "mnt/boot-sav/sdd2" 'pacman -R grub*-common shim-signed'
Or passing the commands separately:
sudo chroot "mnt/boot-sav/sdd2"
pacman -R grub*-common shim-signed
Otherwise, i can forward you to this guide: [How To] Save your Manjaro installation when it breaks
Doing them separated gives the same output, chroot works, but pacman does not. Enclosing in quotes does not work. The problem is that grub*-common and shim-signed are not installed. Listing all installed packages and filtering grub ones I have:
The objective of this command is to remove grub to later reinstall it. Shall I remove these 3?