Fatal error: Uncaught Error: Interface "Facebook\HttpClients\FacebookHttpClientInterface" not found in /home/supercheats/public_html/php/facebook/php-graph-sdk-5.0.0/tests/FacebookTest.php:37 Stack trace: #0 {main} thrown in /home/supercheats/public_html/php/facebook/php-graph-sdk-5.0.0/tests/FacebookTest.php on line 37