[Solved] Iframe's content not displayed

Context

  • Plone 4.3.19 (4320)
  • CMF 2.2.10
  • Zope 2.13.29
  • Python 2.7.17 (default, Nov 1 2019, 09:28:08) [GCC 8.3.1 20190524]
  • PIL 5.1.0 (Pillow)

and, in .../@@filter-controlpanel, "Custom tags" ("Add tag names here for tags which are not part of XHTML but which should be permitted."), iframe is listed.

Problem

The content of an iframe is not displayed (to be checked here: https://stage-latex-gte.univ-littoral.fr/#section-6).

Question

How to make iframes' contents displayed?

Could it be your security settings / the iframe is http and the site is https?

You're right and I just had to replace http by https in the link provided by OSM to make it work: thanks!