I'm trying to recover an accidentally removed directory (/home/garid/.gnupg) with ext4magic. However, It outputs following error:

$ ext4magic /dev/nvme0n1p3  -f /home/garid/.gnupg/  -a $(date -d -5days +%s)
/dev/nvme0n1p3 Error 13 while opening filesystem
ext4magic : EXIT_SUCCESS

I'm not sure what I'm doing wrong. What is Error 13? And How can I make it work? --------------------------------------- My distro is Archlinux. My Partition table:

nvme0n1     259:0    0 476.9G  0 disk
├─nvme0n1p1 259:1    0     1G  0 part /efi
├─nvme0n1p2 259:2    0    32G  0 part [SWAP]
└─nvme0n1p3 259:3    0 443.9G  0 part /

--------------------- As suggested in below, running as root outputs below:

$ sudo ext4magic /dev/nvme0n1p3  -f /home/garid/.gnupg/  -a $(date -d -5days +%s)
[sudo] password for garid:
Filesystem in use: /dev/nvme0n1p3

Using  internal Journal at Inode 8
Activ Time after  : Sun Feb 26 20:15:57 2023
Activ Time before : Fri Mar  3 20:15:58 2023
zsh: segmentation fault  sudo ext4magic /dev/nvme0n1p3 -f /home/garid/.gnupg/ -a $(date -d -5days +%s)

Some rescue operations and similar need to be done with the the drive or volume unmounted. Previously I have downloaded an .iso of GParted which I put on a USB stick and booted up from it into a basic gui from which it was possible to rearrange the partitions on the disk. Now I just deleted a single file I've been working on for days with rm (I know..) and need to really try to get it back. ext4magic should be able to do it, I have the command ready to go. extundelete maybe but that one is unmaintained. I just put my debian-11.3.0-amd64-DVD-1.iso onto the USB from a dd command and booted from it. There was a 'rescue mode' option. That provided a semi-useless terminal with almost no commands or otherwise it allowed the root partition of the PC to be brought to life in a terminal. So I did that but the partition with the file I wanted to recover being /home was also mounted but I needed it unmounted. There are a few rescue things out there such as - https://www.supergrubdisk.org/ https://www.system-rescue.org/ ...which don't look like they have it. I just tested https://www.finnix.org/ - dd'd it to the USB and booted it into its terminal. It had a lot of commands but none to recover ext4 Does anyone know where can I find a bootable CD .iso image to put on the USB-stick which will boot into some kind of live system, not insist on partitioning the drive or installing itself, and have available the command ext4magic or otherwise extundelete ?