SSL Changes in Chrome 56–March, 2017
In Google Chrome Release 56, Google appears to have revoked ALL certificates issued by StartSSL and WoSign rather than just those certificates issued after October 21, 2016. If you have not already replaced otherwise valid StartSSL certificates, you should do so now. While StartSSL was for a long time the best source for free domain verification certificates, Let’s Encrypt and Cpanel are now the perferred approach for most webmasters.
Viewing a Certificate in Chrome 56
To streamline the user interface for non-technical users that do not know what a cerficate is, Google has removed the ability to view a certificate from the normal user interface; you must now go to the developer tools via F12 and the Security tab to look at the certificate characteristics.