Fatal error: Uncaught Error: Interface 'Facebook\HttpClients\FacebookHttpClientInterface' not found in /home/ncue/public_html/facebook/php-graph-sdk/src/Facebook/HttpClients/FacebookCurlHttpClient.php:34 Stack trace: #0 {main} thrown in /home/ncue/public_html/facebook/php-graph-sdk/src/Facebook/HttpClients/FacebookCurlHttpClient.php on line 34