Fatal error: Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member function getId() on null in /homepages/43/d272195232/htdocs/camino/src/Controller/EtapasController.php:50 Stack trace: #0 /homepages/43/d272195232/htdocs/camino/vendor/symfony/http-kernel/HttpKernel.php(150): App\Controller\EtapasController->show('delnorte', '31') #1 /homepages/43/d272195232/htdocs/camino/vendor/symfony/http-kernel/HttpKernel.php(67): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #2 /homepages/43/d272195232/htdocs/camino/vendor/symfony/http-kernel/Kernel.php(198): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #3 /homepages/43/d272195232/htdocs/camino/public/index.php(25): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #4 {main} Next Twig_Error_Runtime: The merge filter only works with arrays or "Traversable", got "NULL" as first argument. in /homepa in /homepages/43/d272195232/htdocs/camino/templates/bundles/TwigBundle/Exception/error.html.twig on line 6