Fatal error: Uncaught Error: Class "Facebook\Helpers\FacebookSignedRequestFromInputHelper" not found in /home/supercheats/public_html/php/facebook/php-graph-sdk-5.0.0/src/Facebook/Helpers/FacebookCanvasHelper.php:31 Stack trace: #0 {main} thrown in /home/supercheats/public_html/php/facebook/php-graph-sdk-5.0.0/src/Facebook/Helpers/FacebookCanvasHelper.php on line 31