Mixed Content ( version 14 ) on dashboard

I tried to run the bloomreach - latest 14 version, and it was working for me locally under http. But when I deploy it to some external server, where the https is on, and made the configuration for it. The main/login page works fine, but whenever I go in, then I don’t see iframed dashboard anymore “was loaded over HTTPS, but requested an insecure frame” - the iframe is the same url with end like /cms/?1&iframed - strange that if I invoke this iframe src from the browser with https at the begining, it seems to be working fine - separately.
Did someone experience the same ?