Yes, I even tried another browser. It seems to be just for this model copier. We happen to be a HP shop, and all the rest of our printers are https with SNMP. NO problem.
When I enter the admin interface of each copier and de-select the 443/ssl option and reboot, the interface comes up.
We have a problem where we are trying to enable SSL - 443 on these machines, and it will kill the browser access on these models. We get a 404 page.
We have about 6 of these machines, and for security reasons to meet policies we need to do this.
When I turn off SSL on 443 it works just fine. Tried rebooting them, as well.
We even made a self signed certificate as well to meet the requirements.