hello, a possible solution will depend on different factors:

• what is the error code shown under technical details on the error page?

in case the error code equals sec_error_unknown_issuer, please attempt to add an exception on the bottom of the error page in order to inspect the certificate like it is shown on the screenshot attached:

• which issuer information does the certificate contain?

please report back with those two pieces of information. thank you!

You appear to be using Kaspersky.

If the certificate is issued by your Kaspersky security software then you have two options:

• disable scanning secure connections in Kaspersky
• install the Kaspersky root certificate and when prompted set the trust bit to use the certificate to "Trust this CA to identify websites"
  http://support.kaspersky.com/us/9093#block1