That is exactly my problem! Just happened. I can't find any help on this. Did you figure it out? If not, I hold out hope someone will help us.
The problem was my own mistake. When creating the self-signed cert, I left the Cisco's default for Key length; it is 512. For security, most (all?) web browsers have been requiring at least 1024 length key to allow access. A year or two. I knew when I created my first cert a while ago, but forgot to change the default when I created the new cert and set it as Primary.
For me, the error is: SSL_ERROR_WEAK_SERVER_CERT_KEY
Some browsers do not bother to say anything except they cannot connect to server, IE for example. Firefox gives me the above error.
Factory Default didn't seem to clear it. I can't find the cert installed on my system. I cleared the browser's cert database, so it rebuilt a new one. Solutions I've found on the internet don't help. For example, for Firefox go into about:config and change some parameters.
