Luke,
JFBConnect doesn't prevent administrators from linking their accounts to a social network. Can you tell me what message you're getting when you try to do so? Also, what process are you following? There are multiple ways to link an existing account to a social network:
* Automatic registration - using the same social network email address as your admin account
* Normal registration - User tries to login with their existing Joomla credentials in the "Login" area
* SCLogin - "Show 'Connect Account' buttons" is enabled. When logged into Joomla, the social network icons appear and the user just clicks them to connect their accounts.
Let me know more information about your process, and we'll help how we can.
Also, I see your subscription has expired. I hope you'll consider re-subscribing soon. The latest release is v5.2.1, and we're planning v5.2.2 next week. There were multiple fixes and improvements in v5.2.1 that may help as well.
Thanks,
Alex