Fatal error: Uncaught exception 'Facebook\Exceptions\FacebookSDKException' with message 'Sessions are not active. Please make sure session_start() is at the top of your script.' in /var/www/sites/sslrelease/dynamic/facebook/fbsdk4-5.1.2/src/Facebook/PersistentData/FacebookSessionPersistentDataHandler.php:50 Stack trace: #0 /var/www/sites/sslrelease/dynamic/facebook/fbsdk4-5.1.2/src/Facebook/PersistentData/PersistentDataFactory.php(57): Facebook\PersistentData\FacebookSessionPersistentDataHandler->__construct() #1 /var/www/sites/sslrelease/dynamic/facebook/fbsdk4-5.1.2/src/Facebook/Facebook.php(156): Facebook\PersistentData\PersistentDataFactory::createPersistentDataHandler('session') #2 /var/www/sites/sslrelease/dynamic/facebook/login.php(13): Facebook\Facebook->__construct(Array) #3 /var/www/sites/sslrelease/inc/class.user.php(255): require_once('/var/www/sites/...') #4 /var/www/sites/sslrelease/inc/class.user_member.php(263): SiteUser->ShowForm() #5 /var/www/sites/sslrelease/inc/class.user.php(61): SiteMember->ShowForm( in /var/www/sites/sslrelease/dynamic/facebook/fbsdk4-5.1.2/src/Facebook/PersistentData/FacebookSessionPersistentDataHandler.php on line 50