Fatal error: Uncaught exception 'Facebook\Exceptions\FacebookSDKException' with message 'Required "app_id" key not supplied in config and could not find fallback environment variable "FACEBOOK_APP_ID"' in /home/linkscare/public_html/vendor/facebook/graph-sdk/src/Facebook/Facebook.php:139 Stack trace: #0 /home/linkscare/public_html/module/social/facebook.php(11): Facebook\Facebook->__construct(Array) #1 /home/linkscare/public_html/module/loginwith.php(11): include('/home/linkscare...') #2 /home/linkscare/public_html/start.php(72): require('/home/linkscare...') #3 /home/linkscare/public_html/public/index.php(13): require('/home/linkscare...') #4 {main} thrown in /home/linkscare/public_html/vendor/facebook/graph-sdk/src/Facebook/Facebook.php on line 139