Fatal error: Uncaught Facebook\Exceptions\FacebookSDKException: Required "app_id" key not supplied in config and could not find fallback environment variable "FACEBOOK_APP_ID" in /var/www/vhosts/findi.pl/httpdocs/plugins/fbsdk/v5/Facebook.php:139 Stack trace: #0 /var/www/vhosts/findi.pl/httpdocs/modules/users/facebook.php(42): Facebook\Facebook->__construct() #1 /var/www/vhosts/findi.pl/httpdocs/header.php(438): include('...') #2 /var/www/vhosts/findi.pl/httpdocs/content.php(10): include('...') #3 {main} thrown in /var/www/vhosts/findi.pl/httpdocs/plugins/fbsdk/v5/Facebook.php on line 139