Fatal error: Uncaught Error: Interface 'Facebook\PersistentData\PersistentDataInterface' not found in /var/www/html/yourfaithfully/vendor/facebook/graph-sdk/src/Facebook/PersistentData/FacebookMemoryPersistentDataHandler.php:31 Stack trace: #0 {main} thrown in /var/www/html/yourfaithfully/vendor/facebook/graph-sdk/src/Facebook/PersistentData/FacebookMemoryPersistentDataHandler.php on line 31