It seems there was a file missing:
FileNotFoundError: [Errno 2] No such file or directory: 'orin-nx-seeed-industry.dtbo'
Try downloading this file to bootloader
directory (for JetPack 5.1.3):
wget -L https://raw.github.com/Seeed-Studio/Linux_for_Tegra/r35.5.0/extra_scripts/recomputer_industrial/orin-nx-seeed-industry.dtbo -O bootloader/orin-nx-seeed-industry.dtbo
See if you can continue the backup operation