cannot access jfbconnect from the backend

That's a bug with new installations and the new version. If you go to the Plugin manager and enable the JFBCSystem plugin, the admin area should be accessible. If not, let us know.

We'll also be releasing v4.3.2 of JFBConnect later today which will fix this and one other annoying error that's come up with the release yesterday. Not normally how fast we like to have releases, so you know, but mistakes do happen.

Sorry about that, and keep us posted how things go.

Thanks,
Alex

When you updated, the SourceCoast library should have been updated too. That's part of the main JFBConnect package.

Do you know what you updated, and how? Was it the main component from the JFBConnect Overview area, or were you updating the addons from the Joomla Update manager? Either way shouldn't have caused this issue, but we'll need to know more to get to the bottom of the problem.

If you need to get past that issue immediately, you can go into the facebook.php file referenced in the error and comment out line 86 mentioned. You can comment it out by putting a # sign in front. That should let you into the admin area where you can check your versions, update, and clear cache (possibly related to the cache issue notice above the error).

Hope that helps,
Alex