EFI variables are not supported and efibootmgr failed to register the boot entry

I'm trying to install grub as my bootloader for my arch linux installation. I am doing this on a virtual machine before I do it on my actual system. I have been following the Arch Installation guide and I have gotten to the point where the it says to install the EFI binaries for the GRUB bootloader. My EFI system partition is mounted and is at mountpoint /mnt/boot from the output of lsblk. The command that the guide is telling me to put in is grub-install --target=x86_64-efi --efi-directory=/boot --bootloader-id=GRUB (after substituting the mount point).

However, when I try to run the command I get:

I have reinstalled both grub and efibootmgr with pacman -Syu grub and pacman -Syu efibootmgr respectively. I have made sure that I am in chroot and I have followed the guide for the setting up mirrors. I have also made sure that the EFI partition is mounted in the correct mountpoint.

I do not know what the issue is and I would appreciate your help. I don't know if it's important but I'll say again that I am doing this on a virtual machine. Thank you.