Even if I clear cookies and site data and refresh the page it still shows the security warning.
I think that means that either DNS propagation is taking an unusually long, and Nabble does warn it can be up to 48hrs or, if it doesn't resolve itself within 24hrs from now, I'd ask Israel to check that the certificate was generated correctly. (I know it can sometimes fail.)
Volunteer Helper - but recommending that users move off the platform! Once the admin for GregHelp now deleted.
Unfortunately, as of today it seems the https has been turned off on Nabble's side, and the problem is back.
The embedding code I see has now changed: ("EZ Animal Rights Forum <script src="http://ez-animal-rights-forum.504.s1.nabble.com/embed/f1"></script>") and now no longer includes https, as it did yesterday.
I believe that the certificates time out and Israel has to turn them back on. I've had trouble with this for the last several months and, given the calendar, it should be set to happen again for me in about a month.
I go to the main section and post a new thread to ask Israel to turn on HTTPS. That usually causes something to happen in the background and it magically works again in a few hours.
Having said that, I don't know why your certificate would have already timed out - unless it is done on a server basis rather than forum basis.