We have a fix for this in the upcoming bug fix release of JFBConnect. In the meantime, if you'd like a quick one line workaround (not the same code as in the upcoming release, but easier for you to put in) you can try the following:
In /plugins/system/jfbcsystem/jfbcsystem.php around line 275,
after this statement:
$option = JRequest::getCmd('option');
Add the following if statement
if($option == 'com_tags')
return;