Fatal error: Uncaught Error: Class 'Facebook\Helpers\FacebookCanvasHelper' not found in /home/ncue/public_html/facebook/php-graph-sdk/src/Facebook/Helpers/FacebookPageTabHelper.php:34
Stack trace:
#0 {main}
thrown in /home/ncue/public_html/facebook/php-graph-sdk/src/Facebook/Helpers/FacebookPageTabHelper.php on line 34