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