Please, post the URL of the forum that is supposed to be embedded and the URL of the page in which it is intended to appear. (Might be worth adding the URL of the gallery too)
NuWest Media wrote
I have a Nabble forum and I changed the domain name using my cPanel. The URL resolves to the correct page. Before I changed the domain name, the Nabble supplied embed code was not working. It would call up the iframe but there was nothing in it... I would just get the link to the forum on Nabble's servers.
That is what you expect if you embed a Nabble forum in a page secured with https.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.