Fatal error: Uncaught Error: Interface "Facebook\Http\RequestBodyInterface" not found in /home2/cp334332/public_html/examcenter/vendor/facebook/graph-sdk/src/Facebook/Http/RequestBodyUrlEncoded.php:31 Stack trace: #0 {main} thrown in /home2/cp334332/public_html/examcenter/vendor/facebook/graph-sdk/src/Facebook/Http/RequestBodyUrlEncoded.php on line 31