Fatal error: Uncaught Error: Interface "Facebook\HttpClients\FacebookHttpClientInterface" not found in /home/supercheats/public_html/php/facebook/php-graph-sdk-5.0.0/tests/FacebookClientTest.php:41 Stack trace: #0 {main} thrown in /home/supercheats/public_html/php/facebook/php-graph-sdk-5.0.0/tests/FacebookClientTest.php on line 41