Fatal error: Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member function getUser() on null in /home/clients/696cf898989e5f9aecb53daddd919d7c/www_raje2018/src/WebsiteBundle/DoctrineListener/PodcastListener.php:116 Stack trace: #0 /home/clients/696cf898989e5f9aecb53daddd919d7c/www_raje2018/src/WebsiteBundle/DoctrineListener/PodcastListener.php(62): WebsiteBundle\DoctrineListener\PodcastListener->checkAuthor(Object(WebsiteBundle\Entity\Advertisement)) #1 /home/clients/696cf898989e5f9aecb53daddd919d7c/www_raje2018/vendor/symfony/symfony/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php(63): WebsiteBundle\DoctrineListener\PodcastListener->preUpdate(Object(Doctrine\ORM\Event\PreUpdateEventArgs)) #2 /home/clients/696cf898989e5f9aecb53daddd919d7c/www_raje2018/vendor/doctrine/orm/lib/Doctrine/ORM/Event/ListenersInvoker.php(117): Symfony\Bridge\Doctrine\ContainerAwareEventManager->dispatchEvent('preUpdate', Object(Doctrine\ORM\Event\PreUpdateEventArgs)) #3 /home/clients/696cf898989e5f9aecb53da in /home/clients/696cf898989e5f9aecb53daddd919d7c/www_raje2018/src/WebsiteBundle/DoctrineListener/PodcastListener.php on line 116