If you're on JFBConnect v4.2.5, I'd worry about upgrading first before you worry about login issues. 4.2.5 is very, very old, and likely has some issues with changes in how Facebook works.Problem 1:
I'd remove the FTP credentials from the Global Configuration area altogether. Those FTP credentials should only be used when Joomla/Apache are setup in a way where they can't write directly to the filesystem. Hopefully, your system isn't as restricted and the FTP layer for writing files isn't necessary at all.Problem 2:
How are you trying to update when you do this? Is this just installing the zip file from this site? If you're trying to use the Joomla Installer -> Update area and just check the box and click "Update", that will not work. Your version of JFBConnect and Joomla are too old.Problem 3: & Problem 4:
The preference has nothing to do with SSL. In general, we simply recommend that you don't allow your site to be accessed over both www and non-www. Some social networks will *only* work for one sub-domain (www and non-www are different sub-domains), which can cause you issues. Additionally, when the same page of your site can be accessed over both, it splits your Like count, google SEO and other things because the social networks/google don't know that they are the same page, so they judge and rank them independently. In essence, you're actually competing with yourself when you do that.One other question. If I remember right, there seemed to be a preference of having the SSL on the domain with the "www." than with not. Is there any difference to this and is one better than the other? I currently have my SSL installed on the domain without the "www.".
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