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 /home/mhd-01/www.langhiranovalley.it/htdocs/facebook-sdk-v5/PersistentData/FacebookSessionPersistentDataHandler.php:50 Stack trace: #0 /home/mhd-01/www.langhiranovalley.it/htdocs/facebook-sdk-v5/Helpers/FacebookRedirectLoginHelper.php(80): Facebook\PersistentData\FacebookSessionPersistentDataHandler->__construct() #1 /home/mhd-01/www.langhiranovalley.it/htdocs/facebook-sdk-v5/Facebook.php(323): Facebook\Helpers\FacebookRedirectLoginHelper->__construct(Object(Facebook\Authentication\OAuth2Client), NULL, NULL, NULL) #2 /home/mhd-01/www.langhiranovalley.it/htdocs/include/topBar.php(45): Facebook\Facebook->getRedirectLoginHelper() #3 /home/mhd-01/www.langhiranovalley.it/htdocs/pubblicita.php(38): require('/home/mhd-01/ww...') #4 {main} thrown in /home/mhd-01/www.langhiranovalley.it/htdocs/facebook-sdk-v5/PersistentData/FacebookSessionPersistentDataHandler.php on line 50