Coolios,
Do you have an SSL certificate on your site? Are you trying to access it through https? Do you get the same error if you try to go to the page non-securely?
Finally, can you let us know what version of JFBConnect you're using and a page we can see the error on? Your subscription expired a month ago, so you won't be running the latest version. I don't believe there are any fixes in v4.2.3 that would fix that issue. Priority support is also intended only for those with an active subscription, but we'll help where we can if there's an obvious fix.
Thanks,
Alex