Fatal error: Uncaught exception 'Exception' with message 'Facebook needs the JSON PHP extension.' in /var/www/vhosts/cardo.nl/httpdocs/libraries/facebook/base_facebook.php:22 Stack trace: #0 /var/www/vhosts/cardo.nl/httpdocs/libraries/facebook/facebook.php(18): require_once() #1 /var/www/vhosts/cardo.nl/httpdocs/libraries/lib.Facebook.php(2): require_once('/var/www/vhosts...') #2 /var/www/vhosts/cardo.nl/httpdocs/global.php(60): require_once('/var/www/vhosts...') #3 /var/www/vhosts/cardo.nl/httpdocs/index.php(4): require_once('/var/www/vhosts...') #4 {main} thrown in /var/www/vhosts/cardo.nl/httpdocs/libraries/facebook/base_facebook.php on line 22