I have the same problem with SMTP setup, opened ticket #266043 with Tech Support. The help article Nick (support tech) sent, doesn't open, so I'm stuck:

Secure Connection Failed

An error occurred during a connection to mbshelp.cloudberrylab.com . PR_END_OF_FILE_ERROR

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.