Fatal error: Uncaught Error: Class 'Facebook\FacebookSignedRequestFromInputHelper' not found in /home/slsparamedicalco/public_html/vendor/facebook/php-sdk-v4/src/Facebook/FacebookJavaScriptLoginHelper.php:32 Stack trace: #0 {main} thrown in /home/slsparamedicalco/public_html/vendor/facebook/php-sdk-v4/src/Facebook/FacebookJavaScriptLoginHelper.php on line 32