Webmin blocked by certificate problem

[Kevin O'Gorman]

I'm trying to make an old COL 3.1.1 workstation share a printer
with my RH7.3 system, and for various reasons I'm not able to
just change it up to a later distro.

The problem is that when I point a browser at https://localhost:10000
I get this dialog box that says "Could not establish an encrypted
connection because certificate presented by localhost is invalid
or corrupted.  Error Code -8182".

Now I know next to nothing about certificates, SSL, or webmin,
and I don't really know where to start on this.  Anyone with
some experience with these things?

As far as I know, Webmin is the only GUI tool around, and I was
hoping to use it for this chore.

++ kevin