Symfony\Component\TypeInfo\Exception\LogicException:
Cannot get base type on "T" template type.

  at C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\type-info\Type\TemplateType.php:36
  at Symfony\Component\TypeInfo\Type\TemplateType->getBaseType()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\serializer\Normalizer\AbstractObjectNormalizer.php:670)
  at Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer->validateAndDenormalize()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\serializer\Normalizer\AbstractObjectNormalizer.php:380)
  at Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer->denormalize()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\serializer\Serializer.php:238)
  at Symfony\Component\Serializer\Serializer->denormalize()
     (C:\github\symfony-bug-normalizer\bug_app\src\Serializer\WrapperDenormalizer.php:32)
  at App\Serializer\WrapperDenormalizer->denormalize()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\serializer\Serializer.php:238)
  at Symfony\Component\Serializer\Serializer->denormalize()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\serializer\Serializer.php:143)
  at Symfony\Component\Serializer\Serializer->deserialize()
     (C:\github\symfony-bug-normalizer\bug_app\src\Controller\MyController.php:21)
  at App\Controller\MyController->index()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\http-kernel\HttpKernel.php:183)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\http-kernel\HttpKernel.php:76)
  at Symfony\Component\HttpKernel\HttpKernel->handle()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\http-kernel\Kernel.php:182)
  at Symfony\Component\HttpKernel\Kernel->handle()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\symfony\runtime\Runner\Symfony\HttpKernelRunner.php:35)
  at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
     (C:\github\symfony-bug-normalizer\bug_app\vendor\autoload_runtime.php:29)
  at require_once('C:\\github\\symfony-bug-normalizer\\bug_app\\vendor\\autoload_runtime.php')
     (C:\github\symfony-bug-normalizer\bug_app\public\index.php:5)