[Calash]

The fix I am currently testing, if anybody wants to give it a try by hand

Plugin: Is user a facebook user?

Locate the following lines

elseif(!$vbulletin->vbnexus->userinfo['associated']){
require_once(DIR . '/includes/functions_login.php');
process_logout();

Comment them out, so they look like the following

//elseif(!$vbulletin->vbnexus->userinfo['associated']){
//require_once(DIR . '/includes/functions_login.php');
//process_logout();