Fatal error: Uncaught Error: Call to a member function extend() on null in /home/cgenial/cgenial/vendor/sensio/generator-bundle/Resources/skeleton/controller/Template.html.php.twig:1 Stack trace: #0 {main} thrown in /home/cgenial/cgenial/vendor/sensio/generator-bundle/Resources/skeleton/controller/Template.html.php.twig on line 1