Fatal error: Uncaught Error: Interface 'Facebook\PseudoRandomString\PseudoRandomStringGeneratorInterface' not found in /usr/local/apache/htdocs/plugin/social/libraries/Facebook/PseudoRandomString/OpenSslPseudoRandomStringGenerator.php:28 Stack trace: #0 {main} thrown in /usr/local/apache/htdocs/plugin/social/libraries/Facebook/PseudoRandomString/OpenSslPseudoRandomStringGenerator.php on line 28