I notified dlink, and received a reply:
"Please try accessing the site again and let us know should you see the
same issue. You may try using https://mydlink.com as an alternative.
Should be good now."
And indeed, Safari is now getting images from mydlink.com
However, Firefox while it logs in, cannot get images -
"The Java Runtime Environment cannot be found."
We installed a new Java via Apple just a few days ago ...