| Doctrine\ORM\ORMException:
The EntityManager is closed.
  at vendor/doctrine/orm/lib/Doctrine/ORM/ORMException.php:144
  at Doctrine\ORM\ORMException::entityManagerClosed()
     (vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php:756)
  at Doctrine\ORM\EntityManager->errorIfClosed()
     (vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php:589)
  at Doctrine\ORM\EntityManager->persist()
     (src/EventListener/ExceptionSubscriber.php:38)
  at App\EventListener\ExceptionSubscriber->onTerminate()
     (vendor/symfony/event-dispatcher/Debug/WrappedListener.php:126)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
     (vendor/symfony/event-dispatcher/EventDispatcher.php:260)
  at Symfony\Component\EventDispatcher\EventDispatcher->doDispatch()
     (vendor/symfony/event-dispatcher/EventDispatcher.php:235)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
     (vendor/symfony/event-dispatcher/EventDispatcher.php:73)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
     (vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:168)
  at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
     (vendor/symfony/http-kernel/HttpKernel.php:88)
  at Symfony\Component\HttpKernel\HttpKernel->terminate()
     (vendor/symfony/http-kernel/Kernel.php:163)
  at Symfony\Component\HttpKernel\Kernel->terminate()
     (public/index.php:27)
 |