Fatal error: Uncaught Facebook\Exceptions\FacebookSDKException: Sessions are not active. Please make sure session_start() is at the top of your script. in /var/www/tsuku2jp/public_html/libs/Facebook/PersistentData/FacebookSessionPersistentDataHandler.php:50
Stack trace:
#0 /var/www/tsuku2jp/public_html/libs/Facebook/Helpers/FacebookRedirectLoginHelper.php(80): Facebook\PersistentData\FacebookSessionPersistentDataHandler->__construct()
#1 /var/www/tsuku2jp/public_html/libs/Facebook/Facebook.php(322): Facebook\Helpers\FacebookRedirectLoginHelper->__construct(Object(Facebook\Authentication\OAuth2Client), NULL, NULL, NULL)
#2 /var/www/tsuku2jp/public_html/invReg/index.php(125): Facebook\Facebook->getRedirectLoginHelper()
#3 {main}
  thrown in /var/www/tsuku2jp/public_html/libs/Facebook/PersistentData/FacebookSessionPersistentDataHandler.php on line 50