Note: Staring with SafeConsole 5.2.1 new certificates will be generated with a correct Subject Alternative Name and you should not receive this error on new installs.

Starting with version 58+ of chrome certificates that does not have a valid "Subject Alternative Name" will show an error. like the one below. 

To continue using SafeConsole click "advance" and "proceed...." If you would like to view the certificate before proceeding, press F12 to open the development tools. And click View Certificate under the Security tab. 

Another option is to use a different supported web-browser (Firefox, Safari, IE11, Edge)

DataLocker is currently working on updating the self-generated certificate to include Subject Alternative Name.