Fatal error: Uncaught Error: Call to a member function widget() on null in /home/srv1clbr/public_html/sport43app/vendor/symfony/framework-bundle/Resources/views/Form/collection_widget.html.php:4 Stack trace: #0 {main} thrown in /home/srv1clbr/public_html/sport43app/vendor/symfony/framework-bundle/Resources/views/Form/collection_widget.html.php on line 4