Customers running Connect on-premise with Stunnel to terminate SSL connections are advised to stay clear of Stunnel version 5.34.
Here’s a new SSL configuration guide (PDF) aimed at Connect 9 and higher. It should help you get SSL working in most environments with and without Events module (CQ).
This is specific to Connect on-premise installations with Events and with SSL configured for the Event service.
Problem: Event template, Event catalog or Email template doesn’t load in iFrame rather gets displayed as blank white page.
Click here to read this article.