Cannot restore mbr via urbackuprestoreclient command

Using urbackuprestore client v2.5.25.0 on debian

I am using this as a guide:
https://urbackup.atlassian.net/wiki/spaces/US/pages/78384925/Assemble+zero-copy+disk+image+on+Linux

Here are the comands leading up to the error:

[root@urbackup: 231031-1403_Image_C]# truncate -s 16M /tmp/mbr.img
[root@urbackup: 231031-1403_Image_C]# losetup /dev/loop0 /tmp/mbr.img
[root@urbackup: 231031-1403_Image_C]# urbackuprestoreclient --restore-mbr Image_C_231031-1403.raw.mbr -o /dev/loop0
2023-10-31 15:25:51: Writing MBR data…
2023-10-31 15:25:51: done.
2023-10-31 15:25:51: Writing extra data at position 512 size 32256 …
2023-10-31 15:25:51: WARNING: Error re-reading partition layout. Invalid argument (code: 22)

I am trying to perform a zero-copy disk image restore so I can boot an image backup.