This page seems to be listing an invalid download link for the 32-bit PC DVD-1 iso.
This link:
https://cdimage.debian.org/debian-cd/current/i386/iso-cd/debian-12.5.0-i386-DVD-1.iso
Should instead be:
https://cdimage.debian.org/debian-cd/current/i386/iso-dvd/debian-12.5.0-i386-DVD-1.iso