Install linux on lattepanda sigma: Error booting from usb

I've been trying to install alpine linux (standard version - from https://alpinelinux.org/downloads/) on a brand new lattepanda sigma computer, however, after making the usb stick bootable with:
sudo dd if=/path/to/alpine-standard-3.18.3-x86_64.iso of=/dev/sda bs=4M status=progress oflag=sync
I'm greeted by the "failure reading sector 0xX from 'cd0'".
Any thoughts on what's wrong?