Name Mismatch Error

• A common SSL certificate problem is that the host name of your website doesn't match the names in the SSL certificate. For example, the SSL certificate may be http://yoursite.com, but you added your website with the "www" prefix. You will get a SSL certificate name error if a user types in http://www.yoursite.com, instead of http://yoursite.com.
  
  

Self-Signed Certificate

• SSL certificate errors may also occur if you have a self-signed certificate installed to your Web server. Self-signed SSL certificates are considered untrustworthy because they were not generated by a recognized certificate authority. Instead, they were generated by your Web server.
  
  

Expired Certificate

• You will have SSL certificate problems if your SSL certificate is out of date, or if it is not yet valid. Contact your authorized SSL certificate provider in this case.