it seems the link has changed, or corrected, but lands at a "blog" page Re zorin and install instructions. my OP has a couple links direct to the ISO downloads.

they are large files, and move slow. its been the better part of a day and its almost finished downloading for me.

3.5, and 7.5 GB respectively.

https://zorin.com/os/download/18/core/ [3.5GB ISO]

https://zorin.com/os/download/18/education/ [7.5GB ISO]